A Sierra Foothills classic linking the American River 50 and Way Too Cool 50K into one 100-mile journey
Rio Del Lago 100 Mile takes place on November 07, 2026 in Granite Bay, CA.
Rio Del Lago 100 Mile is 100 miles with 13,870 ft of elevation gain.
No — Rio Del Lago 100 Mile uses open registration; no lottery is required.
Yes, crew is allowed at Rio Del Lago 100 Mile. Sign in to Trailrace to see crew access for each aid station.
Yes, pacers are allowed at Rio Del Lago 100 Mile.
Yes, Rio Del Lago 100 Mile allows drop bags.
Rio Del Lago 100 Mile has 17 aid stations along the course.
The overall cutoff for Rio Del Lago 100 Mile is 30h. Per-aid-station cutoffs are available to signed-in Trailrace members.
Other trail races within 82 miles
A 100-mile journey starting at Beal's Point on Folsom Lake that stitches together two iconic Northern California trail races — the American River 50 and Way Too Cool 50K. Runners traverse oak woodland and river canyons, run the Johnny Cash Trail through Historic Folsom, cross the 109-year-old No Hands Bridge, and ascend the Western States Trail to the Auburn Dam Overlook before retracing the route home. The course is a lollipop with a small lake loop at Beal's Point bookending a long out-and-back into Auburn.
Some ultra experience recommended
Granite Bay, CA, United StatesNovember 07, 2026
For 2026, it is highly suggested (but not required for 2026) that each Rio Del Lago 100 runner volunteers a minimum of 6 hours of service towards trail maintenance or working a trail or road race event.
| Location | Mile | Elevation |
|---|---|---|
Beals Point Start | 0.0 | 466 ft |
Willow Creek Aid Station | 9.3 | 131 ft |
Negro Bar Aid Station | 17.2 | 164 ft |
Beals Point Aid Station | 21.7 | 466 ft |
Granite Beach Aid Station | 26.6 | 469 ft |
Horseshoe Bar Aid Station | 33.4 | 522 ft |
Rattlesnake Bar Aid Station | 36.0 | 518 ft |
Cardiac Hill (Base) Aid Station | 42.2 | 495 ft |
Overlook Aid Station | 45.4 | 1,312 ft |
No Hands Bridge Aid Station | 49.4 | 699 ft |
Auburn Lakes Trail Aid Station | 59.9 | 1,549 ft |
Cool Fire Station Aid Station | 69.5 | 1,549 ft |
No Hands Bridge Aid Station | 72.8 | 682 ft |
Overlook Aid Station | 76.8 | 1,266 ft |
Cardiac Hill (Base) Aid Station | 80.0 | 482 ft |
Rattlesnake Bar Aid Station | 86.2 | 466 ft |
Horseshoe Bar Aid Station | 88.8 | 489 ft |
Granite Beach Aid Station | 95.6 | 551 ft |
Beals Point Finish | 100.0 | 466 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Camping at Beals Point Campground within Folsom Lake State Recreation Area. Reservations required through California State Parks.
Early November in California's Sierra Nevada foothills brings cool, generally dry conditions. Daytime highs average around 66°F (19°C) while overnight lows drop to around 42°F (6°C). Runners cover a significant portion of the course in darkness, making layers essential. Morning fog is possible in the American River canyon sections. The low-elevation course (approximately 300–1,400 ft) avoids alpine weather but conditions can change — prepare for anything.
No recommended gear specified
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