It takes most riders six to eight weeks to go from 20 miles to 50 miles on a bike, and the way you get there matters more than the calendar. You extend your weekend long ride by roughly 10 percent every week, keep two shorter rides easy, fuel from the first hour, and cut your volume the week before you go. Here is that plan, week by week.
Most of the plans I found for this jump start from zero miles or assume you already ride 30 on a weekend. Almost none of them cover the specific bridge from a 20-mile maximum to a 50-miler, which is exactly where a lot of riders are stuck. Twenty miles is a good ride. Fifty is a different sport, and the difference is mostly time in the saddle, not speed.
A rider comfortable at 20 miles is roughly 40 percent of the way to a first 50. Skip the steps and the ride usually ends badly, most often somewhere around mile 35 when the legs go quiet and the sky starts to look very large.
Here are the six numbers that run the whole plan:
- Start: 20 miles as your longest comfortable ride
- Increase: about 10 percent on the long ride each week
- Length: 6 to 8 weeks, longer if life gets in the way
- Frequency: 3 to 4 rides per week, two of them easy
- Fueling: 30 to 60 grams of carbohydrate per hour, starting in hour one
- Taper: cut volume 7 to 10 days out, but keep riding
Table of Contents
- What You Need
- A bike you trust for three hours
- A kit that fits in a jersey pocket
- Food you can eat while pedaling
- Something to log with
- A route you have scouted
- Step-by-Step: How to Go From 20 Miles to 50 Miles
- Step 1: Establish a comfortable 20-mile baseline
- Step 2: Add easy miles before long rides
- Step 3: Build the long ride gradually
- Step 4: Practice fueling and hydration
- Step 5: Pace the 50-mile ride
- Step 6: Recover and repeat the ride
- What a Training Week Actually Looks Like
- Common Mistakes
- Jumping straight to 50
- Riding every session hard
- Waiting until you are hungry to eat
- Adding miles to the weekend ride but not the week
- Ignoring the taper
- Treating it as a race
- Missing a week and pretending it did not happen
- Riding every long ride in the same direction with a tailwind
- Frequently Asked Questions
- How many weeks does it take to go from 20 miles to 50 miles?
- Should a beginner ride 50 miles in one continuous ride?
- How many times a week should I cycle when building from 20 to 50 miles?
- What pace should I use for a first 50-mile ride?
- What should I eat before and during a 50-mile cycling ride?
- What should I do if I feel unusually tired during training?
- Conclusion
What You Need
You do not need a new bike, and you do not need a power meter. You need a bike that is mechanically sound, a small repair kit, enough water and food to cover the longest hour you will ride, and somewhere to write down what you actually did.
A bike you trust for three hours
Any bike works if it is maintained. A hybrid, a gravel bike, a mountain bike, a fat bike, even a well-set-up commuter will get you 50 miles. The long rides are about repeating one pedal stroke a lot of times, and that is not a fast-bike job.
Before week one, have the chain checked for stretch, the tires aired up, the brakes tested, and the bolts on the bars and stem hand-tightened. A cassette worn thin shifts badly under load in exactly the conditions where you do not want to be shifting badly.
If the saddle hurts after 90 minutes, fix that before you add distance. A bike shop can adjust the saddle height and tilt, and the cost of a fit session is small next to a ride cut short at mile 25 by a sore you could have prevented.
A kit that fits in a jersey pocket
- Spare tube, tire levers, and a patch kit or tubeless plugs
- Mini pump and a single carbon dioxide cartridge
- Multitool with a chain breaker and a spare chain link
- Two bottles and a way to mount them, plus a third bottle on long rides
- Bar bag or top-tube bag for snacks and a phone
- One pair of bib shorts as backup, and chamois cream
- Cash for the café you did not plan on stopping at
The spare shorts are the item riders skip and then regret. A seam that has been rubbed raw at hour three is the difference between a good day and a very long walk to a car.
Food you can eat while pedaling
For a 50-mile ride at an easy pace, you are looking at roughly three hours of eating. Anything that is easy to open, easy to chew, and easy to digest while you are moving will do. Bars, chews, rice cakes with jam, plain bagels, dates, and bananas all have their fans.
Fat-heavy and high-fiber food is a bad bet. You cannot digest a dense energy bar at mile 32 while your heart rate is high, and if the ride has a long climb in the last third, that is exactly when you will be trying.
Something to log with
A phone note is plenty. Write down three things after every long ride: distance, moving time, and how the effort felt on a scale of one to ten. That third one is the most useful number in the whole process, because it tells you whether the increase was too much.
A route you have scouted
Pick the 50-mile route in advance and know where the water, the food, the toilets, and the bailouts are. A bailout plan is not giving up. It is a rider who sees a headwall at mile 40, knows the turn-off is two miles back, and gets home without emptying the tank.
Scout it once at 30 miles out, or ride the first and last ten miles a couple of weeks before the day. Flat loop routes hide their worst climb until the second lap, and the second lap is when your legs are quiet.
Step-by-Step: How to Go From 20 Miles to 50 Miles
Step 1: Establish a comfortable 20-mile baseline
Before adding anything, ride 20 miles and make sure it is genuinely comfortable. Comfortable means you could have kept going, that you finished without counting down the miles, and that you were not sore in a way that lasted more than a day.
Log the moving time. Twenty miles on flat terrain at an easy conversational pace might take an hour and a half; the same 20 miles with 1,500 feet of climbing might take two and a half hours. That gap is the single most useful thing you learn in this first ride.
Riders on r/Biking use a simple community heuristic for this: you can usually hold roughly twice your longest ride. If 20 miles is genuinely easy, you are already at the halfway benchmark. If 20 miles is a hard effort every single time, spend two or three weeks making it easy before you start the progression.
If you cannot ride two hours continuously today, that is the thing to fix first. Time in the saddle, not distance, is what builds the endurance for mile 40.
Step 2: Add easy miles before long rides
The mistake here is trying to add 50 miles to the weekend ride while your weekday riding stays erratic. Shorten the long ride you are extending and fill the difference with easy weekday miles.
Most of those miles should be genuinely easy, meaning you can hold a conversation with the person next to you. On a heart rate monitor that sits in the lower part of your aerobic range. This is where an endurance base is built, and it is where the real adaptation for a 50-miler happens.
Most of the volume in this plan should sit at the easy end. Riders in the TrainerRoad forum forums describe the same structure from the other direction: a couple of harder sessions a week and one long endurance ride, with everything else kept quiet.
What to avoid is making every session a test. If your easy rides feel easy and your long ride feels steady and slightly boring, that is the correct feeling.
Step 3: Build the long ride gradually
Add about 10 percent to the long ride each week. The 50 percent rule helps here too: before you attempt a 50, the longest ride you have done should be around 25. Most riders overshoot that benchmark early and then stall.
| Week | Long ride | Change | Total weekly miles | Focus |
|---|---|---|---|---|
| 1 | 20 mi | baseline | 55-65 | Confirm the 20 is comfortable; log time and effort |
| 2 | 22 mi | +10% | 60-70 | Add one bottle and one snack to the long ride |
| 3 | 25 mi | +14% | 65-80 | Hit the 25-mile benchmark; first ride past two hours |
| 4 | 28 mi | +12% | 45-55 | Recovery week: cut total miles, hold the long ride |
| 5 | 32 mi | +14% | 70-85 | First 3-hour ride; test your full fueling plan |
| 6 | 37 mi | +16% | 75-90 | Add a climb; rehearse the route’s hard section |
| 7 | 43 mi | +16% | 55-65 | Taper the total, keep some length, drop the hard days |
| 8 | 50 mi | event | 40-50 | Short easy rides midweek, then the 50 on the weekend |
Week 3 is the one that surprises people. Twenty-five miles sounds modest right up until it takes three hours with a headwind, and it is usually the first ride where sitting down at a junction feels genuinely hard.
Week 4 is a deliberate cut. It is not lost progress; it is where the training you have done gets absorbed. Riders who skip the recovery week usually feel it two weeks later instead.
You do not have to hit these numbers exactly. Repeat a week whenever you like. The MTBR forum advice for first 50-milers is exactly this: add 5 to 10 miles, go easy, and ignore speed. A plan you repeat is worth more than a plan you abandon at week 5.
If you do everything outdoors, that is fine. An indoor trainer can carry the time-in-the-saddle work on a short day or in bad weather, but it does not rehearse handling, stopping, cornering, or shifting while out of the saddle, so keep at least one long outdoor ride a week.
Step 4: Practice fueling and hydration
Most riders who blow up at mile 35 were not under-fueled for the whole ride. They ate nothing for the first 90 minutes, then tried to catch up in the last hour. Practice eating on short rides so the 50 is not the first time your stomach has had to work.
Aim for 30 to 60 grams of carbohydrate per hour, starting from the first hour rather than waiting until you are hungry. Beginners usually do better at the lower end, and any number in that range beats zero.
Hydrate before you are thirsty, and drink across the ride rather than in the last 20 miles. Sip a bottle an hour rather than emptying one every 20 minutes, and add electrolytes if the day is hot or you are salting a lot on the jersey.
Working in mile markers makes the math easy, and it survives the days when you have no idea what hour it is:
| Mile marker | What to take in | Why |
|---|---|---|
| 0 | Normal breakfast, 2-3 hours before, plus one bottle | You leave full, not heavy |
| 20 | Half a bar or a handful of chews, plus a drink | First habit to build; do this even if you are not hungry |
| 35 | Full snack and a drink | The classic low point; eat before you notice it |
| 45 | Full snack and a drink | Protects the last 5 miles from emptying out |
| Finish | Protein and carbs within the hour, then rehydrate | Starts recovery while the muscles are still loaded |
A bottle of plain water with one sports drink in the rotation is a perfectly good system. So is mixing half-strength drink in both bottles. You do not need a complicated setup, and you do need to have tested whatever you choose on at least two training rides first.
On anything longer than three hours, drink a plain water bottle alongside the sports drink, and eat real salt somewhere. Bonking is real, and it is the reason a lot of 50-mile rides end at 35.
Step 5: Pace the 50-mile ride
Start slower than feels reasonable. Most first 50-milers lose the ride in the first 20 miles by riding at their usual 20-mile pace, then discovering they have nothing left at mile 40.
Use a pace you could hold for five hours, not the pace you can hold for an hour. Concretely: settle in with a full sentence in reserve, back off through anything steeper than about 5 percent, and only start pushing in the last 10 miles if you feel good.
Terrain changes the number more than most riders expect. Fifty flat miles is roughly a three-hour ride. Fifty miles with 3,000 feet of climbing is closer to four and a half, and it is a completely different physical demand on the legs and the fueling.
| Route | Elevation | Expected moving time | What it feels like |
|---|---|---|---|
| Flat | under 500 ft | 2.5-3 hours | Boring in a good way; test your pacing and your food |
| Rolling | 800-1,500 ft | 3-3.5 hours | Constant small efforts; the one that punishes overpacing |
| Hilly | 2,500 ft or more | 4-5 hours | A climbing day wearing a costume; legs gone long before the finish |
For a first 50, pick rolling or flat. A hilly 50 is a good ride six months from now, and it is a bad first attempt because the climbing plus the time turns it into a 4-hour-plus day on tired legs.
Weather counts too. A 20 mph headwind can turn a flat 50 into a five-hour ordeal, so check the forecast, and if the wind is bad, reschedule rather than suffer. Riding with a group whose pace is faster than yours is the most common way first 50-milers get wrecked.
Step 6: Recover and repeat the ride
After the 50, eat within the hour and drink more than you think you need. Sleep properly. The legs will be sore for two or three days, and that is normal.
Then review honestly. Three questions cover it: did the pacing hold, did the fueling work, and where did the discomfort show up? If you bonked at 35, the problem was probably that you ate nothing early. If you blew up at 45, it was probably pacing. If your hands went numb at hour two, it was position or bar tape.
If the answer is that you were simply too tired from a bad week, cut your weekly mileage by 30 percent for two weeks and start the next block from where you actually finished rather than where the chart said you should be.
What comes next depends on why you wanted the 50. If you wanted it as a milestone, ride it again on a different route. If you were building toward a 100-mile century, keep the structure for six more weeks and repeat this block at a higher ceiling, because a century needs a long ride in the 60s before you attempt it.
What a Training Week Actually Looks Like
The plan only works if it fits into the week you actually have. Here is a four-ride version that most people with a desk job can keep, plus a note on what to drop when you are short on time.
| Day | Session | Details |
|---|---|---|
| Monday | Rest or 20-30 min mobility | Nothing on the bike; hips and hamstrings respond to the weekend |
| Tuesday | Easy ride | 60-75 min at conversational pace, flat or rolling |
| Wednesday | Interval session (optional) | 4-6 sets of 3 min hard, 3 min easy; skip it if the week is busy |
| Thursday | Easy ride | 60-90 min, conversational, add 5-8 min of hills if you feel fresh |
| Friday | Rest | Prep food and kit for tomorrow |
| Saturday or Sunday | Long ride | The week’s key session, distance set by the progression table |
The Wednesday session is the one to cut first. It exists to keep some faster riding in the program while you add volume, not because your first 50 needs speed. Intervals build fitness; the long ride builds the thing you actually need, which is time on the bike.
A three-ride week works too. Make Tuesday an easy hour, drop Wednesday, and keep Thursday easy with a short hill effort at the end. The structure that matters is two easy rides plus the long ride.
On weeks when the weather is poor, move the long ride to the indoor trainer rather than skipping it, and keep at least one long outdoor ride a week in the block. Time in the saddle transfers indoors; cornering, stopping, and eating real food do not, which is why outdoor hours stay non-negotiable.
Cross-training fits around this schedule, not instead of it. Twenty minutes of mobility work, some light strength work twice a week, or an easy swim on a rest day supports the build without adding saddle time. It does not replace the long ride.
Common Mistakes
Jumping straight to 50
The most common failure, and the one that ends a first attempt at mile 35. The 25-mile benchmark exists so your first 50 is about execution, not survival.
Riding every session hard
If three of your four weekly rides are at threshold, the long ride has nowhere to go. Most of your volume should be easy enough to talk in full sentences, and the 75 percent rule is the reminder that almost all of your time belongs at the easy end.
Waiting until you are hungry to eat
Hunger is a lagging signal and it arrives late. Eat on schedule at mile 20, 35, and 45, and start in the first hour even on short rides so the habit already exists on the day.
Adding miles to the weekend ride but not the week
Going from 20 to 50 miles in the weekend alone is a 150 percent increase in one session. Extend the long ride slowly, add easy weekday miles, and cut total volume every third or fourth week.
Ignoring the taper
The last week before the 50 should be the easiest week of the block, not the hardest. Cut the volume 7 to 10 days out, drop your hard sessions, and keep a few short rides in so your legs stay awake.
Treating it as a race
If you have an event date and a time goal, you will ride the first hour too hard. Set the intention first: finish, comfortably, having eaten and hydrated properly.
Missing a week and pretending it did not happen
Here is the rule no published plan gives you. If you miss a week, do not try to make it up next week. Drop back to the long ride you last finished comfortably and rebuild from there. If you are three weeks out, move the event date instead of compressing the plan into two brutal weeks.
Riding every long ride in the same direction with a tailwind
Out-and-backs are the most useful format in the plan because the return leg is usually into wind. A tailwind long ride teaches you a speed you cannot hold on the day.
Frequently Asked Questions
How many weeks does it take to go from 20 miles to 50 miles?
Six to eight weeks is the usual range for a rider whose longest ride is a comfortable 20 miles, following about 10 percent growth in the long ride each week and one recovery week in the middle. Riders who are already cycling four to five hours a week may do it in six. If you can only ride twice a week, or if 20 miles is still a hard effort, allow ten to twelve. Progress you can sustain beats a fast plan you abandon.
Should a beginner ride 50 miles in one continuous ride?
Not on your first attempt, and not without rehearsal. Aim to have a long ride of roughly 25 miles, about half the target distance, before you go the full 50, which is the common community benchmark. Then ride 32, 37, and 43 miles first so the 50 is the fourth time you have been past three hours. A first 50 done as the culmination of training is a celebration; a first 50 done as a surprise is usually a long walk.
How many times a week should I cycle when building from 20 to 50 miles?
Three or four rides a week fits most people with a job: one long ride, one or two easy rides of 60 to 90 minutes, and optionally one harder session such as a short interval set. Keep at least one full day with no riding at all. If you can only manage three sessions, make two of them easy and protect the weekend long ride, because the long ride is the session that transfers to your goal.
What pace should I use for a first 50-mile ride?
Pick a pace you could hold for five hours rather than the one you can hold for an hour, and start the first 20 minutes below that. On flat terrain, a beginner who rides 20 miles in an hour and a half will usually finish 50 miles somewhere around three hours. The right pace feels almost too easy for the first half, lets you keep a full sentence in reserve through the climbs, and still allows you to push in the last 10 miles if you feel good.
What should I eat before and during a 50-mile cycling ride?
Eat a normal breakfast two to three hours before you roll, not a heavy one. During the ride, aim for 30 to 60 grams of carbohydrate per hour starting in the first hour, and keep a drink going the whole way. Simple, portable options work best: energy bars, chews, dates, bagels with jam, and bananas, plus a bottle of water alongside your sports drink. Practice the exact food on at least two training rides first, because race day is not the time to find out what sits badly.
What should I do if I feel unusually tired during training?
Stop adding distance. Unusual fatigue during a build usually means the previous increase was too large, your sleep or work stress is interfering, or you are fueling the rides but not eating enough between them. Drop back to your last comfortable long ride, hold it for a week, and resume from there. Persistent exhaustion, dizziness, chest pain, or unusual breathlessness is a different matter entirely: stop riding and speak to a doctor, since those are not training symptoms.
Conclusion
The distance between a 20-mile ride and a 50-mile ride is six to eight weeks of small, boring, mostly easy miles. Go from 20 to 22 to 25, drop back for a recovery week, then push to 32, 37, and 43 before you try 50 on the day.
Start by riding your 20 miles this weekend and timing it. If you finish feeling like you had miles left, you are ready to begin the progression. Eat on schedule, start slower than feels right, and be back in the saddle next weekend.
