Home › Articles › Century Ride Training: A 12-Week Plan to Your First 100 Miles
Your First Century: The 12-Week Training Plan for 100 Miles
One hundred miles is cycling's marathon, and the training truth is friendlier than the number sounds: if you can currently ride 25–30 miles, twelve weeks of structured progression gets you to a century. The plan is built on one principle — the long ride is the workout that matters; everything else supports it.
The weekly template (4 rides, ~6–9 hours)
- Long ride (weekend): the centerpiece, at conversational pace.
- Medium endurance ride: 60–90 minutes easy.
- Quality day: 45–75 minutes with tempo or threshold blocks (e.g., 3 × 10 minutes comfortably hard) — this raises the cruising speed that makes 100 miles take 6.5 hours instead of 8.
- Short recovery spin or rest.
The long-ride progression
| Week | Long ride | Week | Long ride |
|---|---|---|---|
| 1 | 30 mi | 7 | 55 mi |
| 2 | 35 mi | 8 | 62 mi (metric century) |
| 3 | 40 mi | 9 | 70 mi |
| 4 | 30 mi (recovery week) | 10 | 75–80 mi |
| 5 | 45 mi | 11 | 50 mi (taper begins) |
| 6 | 50 mi | 12 | Event week: two short spins, then 100 |
Notice two things: the longest training ride is 75–80 miles — event-day adrenaline, aid stations, and company cover the rest — and every fourth week steps back. The step-back weeks are where adaptation happens; skipping them is the classic overuse path.
Rehearse everything on long rides
From week 5, treat long rides as dress rehearsals: the exact fueling plan (30–60 g carbs per hour, starting at 45 minutes — full details in the nutrition guide), the hydration schedule (hydration guide), the shorts, the saddle, the bike setup. Anything that chafes, bonks, or aches at 60 miles will be intolerable at 90. Fix fit issues early with bike fit basics.
Event-day pacing
The century-killer is the first 25 miles: fresh legs and group excitement seduce riders into a pace they pay for at mile 70. Ride the first half deliberately easier than feels necessary — you should reach mile 50 feeling like you've done almost nothing. Draft legally in groups (etiquette in our group riding guide), stop briefly at aid stations but keep stops under 10 minutes so legs don't stiffen, and bank on a finishing time of distance ÷ your training long-ride pace, plus 30–45 minutes of stops — run the math with the calculator. The last 20 miles are ridden on fueling discipline and stubbornness, in that order.
Keep exploring
Put these numbers to work with the free CalculateBike speed and calorie calculator, browse the cycling gear guide, or read more cycling articles. Prefer two feet to two wheels? Our sister tools CalculateSteps and CalculateRun cover walking and running.