Marin Century course preview
The 2026 Marin Century course is 101.9 mi (164.0 km) and finishes where it starts, with 7,141 ft of climbing. RideMorrow finds 30 distinct climbs and 31 descents; the listed climbs account for 63% of the total ascent, and the rest comes from shorter rollers. The hardest climb by FIETS score starts at 91.9 mi: 1.90 mi at an average 5.3%, peaking at 13.5% over 100 m. The final quarter holds the most climbing (29%).
- Distance
- 101.9 mi164.0 km
- Elevation gain
- 7,141 ft2,177 m
- Climbs
- 3031 descents
- Steepest 100 m
- 13.8%On a listed climb
- Corners
- 16333 technical
- High point
- 736 ftLow 13 ft
Elevation profile
Shaded: every listed climb. Numbered: the hardest.The 5 hardest climbs
Ranked by FIETS score- 1Climb 27 · from 91.9 mi1.90 mi · 532 ft up · 5.3% average, 13.5% steepest0.9
- 2Climb 2 · from 1.9 mi0.54 mi · 215 ft up · 7.5% average, 10.5% steepest0.5
- 3Climb 21 · from 72.6 mi1.12 mi · 301 ft up · 5.1% average, 12.9% steepest0.5
- 4Climb 6 · from 13.9 mi0.76 mi · 217 ft up · 5.4% average, 13.8% steepest0.4
- 5Climb 13 · from 46.3 mi1.06 mi · 284 ft up · 5.1% average, 9.8% steepest0.4
Every climb, in ride order
30 climbs · top 5 highlighted| Climb | Starts at | Length | Elevation gain | Avg grade | Steepest 100 m | FIETS |
|---|---|---|---|---|---|---|
| 1 | 0.3 mi | 0.73 mi | 113 ft | 2.9% | 5.4% | 0.1 |
| 2 | 1.9 mi | 0.54 mi | 215 ft | 7.5% | 10.5% | 0.5 |
| 3 | 2.9 mi | 0.34 mi | 82 ft | 4.6% | 8.0% | 0.1 |
| 4 | 5.9 mi | 0.57 mi | 95 ft | 3.2% | 8.7% | 0.1 |
| 5 | 11.9 mi | 1.65 mi | 245 ft | 2.8% | 10.9% | 0.2 |
| 6 | 13.9 mi | 0.76 mi | 217 ft | 5.4% | 13.8% | 0.4 |
| 7 | 29.2 mi | 0.30 mi | 93 ft | 5.8% | 11.9% | 0.2 |
| 8 | 29.9 mi | 0.76 mi | 110 ft | 2.7% | 8.6% | 0.1 |
| 9 | 38.7 mi | 0.21 mi | 91 ft | 8.2% | 12.2% | 0.2 |
| 10 | 39.5 mi | 0.22 mi | 77 ft | 6.5% | 10.8% | 0.2 |
| 11 | 41.9 mi | 0.20 mi | 101 ft | 9.6% | 12.2% | 0.3 |
| 12 | 42.8 mi | 0.30 mi | 79 ft | 5.0% | 9.2% | 0.1 |
| 13 | 46.3 mi | 1.06 mi | 284 ft | 5.1% | 9.8% | 0.4 |
| 14 | 47.7 mi | 0.92 mi | 163 ft | 3.4% | 8.4% | 0.2 |
| 15 | 51.2 mi | 0.25 mi | 78 ft | 5.8% | 9.6% | 0.1 |
| 16 | 54.0 mi | 0.47 mi | 97 ft | 3.9% | 6.3% | 0.1 |
| 17 | 57.6 mi | 0.40 mi | 89 ft | 4.2% | 7.4% | 0.1 |
| 18 | 59.6 mi | 1.39 mi | 233 ft | 3.2% | 10.6% | 0.2 |
| 19 | 69.2 mi | 0.57 mi | 99 ft | 3.3% | 6.5% | 0.1 |
| 20 | 71.3 mi | 0.61 mi | 93 ft | 2.9% | 7.1% | 0.1 |
| 21 | 72.6 mi | 1.12 mi | 301 ft | 5.1% | 12.9% | 0.5 |
| 22 | 76.7 mi | 0.55 mi | 122 ft | 4.2% | 8.4% | 0.2 |
| 23 | 81.3 mi | 1.01 mi | 190 ft | 3.6% | 11.3% | 0.2 |
| 24 | 82.9 mi | 0.42 mi | 147 ft | 6.6% | 11.7% | 0.3 |
| 25 | 87.9 mi | 0.91 mi | 159 ft | 3.3% | 10.1% | 0.2 |
| 26 | 90.7 mi | 0.38 mi | 68 ft | 3.4% | 6.8% | 0.1 |
| 27 | 91.9 mi | 1.90 mi | 532 ft | 5.3% | 13.5% | 0.9 |
| 28 | 95.0 mi | 0.65 mi | 132 ft | 3.9% | 9.7% | 0.2 |
| 29 | 98.1 mi | 0.62 mi | 92 ft | 2.8% | 6.9% | 0.1 |
| 30 | 99.1 mi | 0.45 mi | 96 ft | 4.0% | 9.4% | 0.1 |
Descents
31 descents drop 4,800 ft in total. The steepest:
- Descent 27 · from 93.8 mi 0.85 mi at 7.1% average, 14.8% at its steepest
- Descent 5 · from 14.7 mi 1.49 mi at 4.3% average, 14.1% at its steepest
- Descent 14 · from 48.6 mi 1.32 mi at 6.8% average, 12.9% at its steepest
- Descent 21 · from 73.7 mi 0.96 mi at 4.7% average, 12.4% at its steepest
- Descent 6 · from 19.6 mi 0.71 mi at 2.2% average, 11.7% at its steepest
Corners
163 corners detected from the course geometry, 26 of them on a descent.
- 8 Very technical
- 25 Technical
- 54 Moderate
- 76 Gentle
Technical corners on descents
- 7.9 mi 80° left bend on a 5.6% approach · Technical
- 15.6 mi 81° right turn on a 6.8% approach · Technical
- 16.4 mi 96° right turn on a 3.6% approach · Very technical
- 18.1 mi 70° right bend on a 6.0% approach · Technical
- 29.9 mi 62° left bend on a 7.5% approach · Very technical
- 31.1 mi 31° left bend on a 9.2% approach · Technical
Corners describe the line on the map, not road conditions. Sightlines, grip and traffic aren't known.
Marin Century course FAQ
How much climbing is in the Marin Century?
7,141 ft (2,177 m) over 101.9 mi, measured from the organizer's course file with the elevation smoothed and small fluctuations ignored. Other tools may show a different total because they count every small rise.
How many climbs does the Marin Century have?
30 climbs of at least 300 m with 20 m of elevation change and a 2% average grade, plus shorter rollers. Together the listed climbs gain 4,491 ft.
What is the hardest climb in the Marin Century?
Climb 27, starting at 91.9 mi: 1.90 mi gaining 532 ft at an average 5.3%. Its FIETS score is 0.9.
What is the longest climb in the Marin Century?
Climb 27, 1.90 mi from 91.9 mi, averaging 5.3%.
How steep does the Marin Century get?
The steepest 100 m on a listed climb averages 13.8%. Grades are measured over 100 m, so short ramps can be steeper.
Where does this course data come from?
From the course Marin Cyclists publishes on its official site (https://marincentury.com/rider-info), retrieved 2026-10-12. Organizers change courses, so check their site before the event.
Source and method
Course: Century - 2026 Marin Century - Official Route, published by Marin Cyclists. Retrieved 2026-10-12. RideMorrow is not affiliated with the event. Organizers change courses, so check the official site before the event.
Elevation comes from the route file, resampled every 10 m and smoothed. Climbs and descents need at least 300 m of length, 20 m of elevation change and a 2% average grade. Grades are measured over 100 m. Climbs are ranked by FIETS score: height² ÷ (length × 10), both in metres, without the index's high-altitude bonus. A score of 1 is a solid climb; 5 and above is a mountain pass. Weather, surface conditions, traffic and closures are not included.
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