Big Bear Lake, California · Trail
Official site ↗Kodiak Ultra Marathons by UTMB
A UTMB World Series Major at Big Bear Lake in the San Bernardino Mountains, run in early October: a 100 miler with 16,000 ft of climbing beside a 100K and a 50K, all finishing in the Village.
Friday, October 9, 2026 at 1:00 PM GMT-7
The 2026 routes are pending approval by the US Forest Service, and the race says minor changes could be made before race day to avoid hazard areas. The 100 Mile's aid-station chart and cutoffs were re-drawn for 2026; the shorter races still carry their 2025 charts.
Sold out.
Distances
100 Mile
- Distance
- 100.3 mi (161 km)
- Vert gain
- 16,000 ft (4,900 m)
- Start
- 1:00 PM GMT-7
- Cutoff
- 36 hr
Starts at the Rim Nordic Ski Area at 1 p.m. Friday and closes in the Village at 1 a.m. Sunday. Sold out for 2026 · WSER 2027 qualifier (sub-36:00)
100K
- Distance
- 99 km (62 mi)
- Vert gain
- 3,120 m (10,200 ft)
- Start
- Oct 10, 6:00 AM GMT-7
- Cutoff
- 20 hr
Starts from the Village at 6 a.m. Saturday and closes at 2 a.m. Sunday. Sold out for 2026 · WSER 2027 qualifier (sub-19:00)
50K
- Distance
- 48.4 km (30 mi)
- Vert gain
- 1,339 m (4,400 ft)
- Start
- Oct 10, 8:00 AM GMT-7
- Cutoff
- 10 hr
Starts from the Village at 8 a.m. Saturday on the race page and its time chart, though the event schedule prints 7:30; closes at 6 p.m. Sold out for 2026
| Distance | Vert gain | Start | Cutoff | Notes |
|---|---|---|---|---|
| 100.3 mi (161 km) | 16,000 ft (4,900 m) | 1:00 PM GMT-7 | 36 hr | Starts at the Rim Nordic Ski Area at 1 p.m. Friday and closes in the Village at 1 a.m. Sunday. Sold out for 2026 · WSER 2027 qualifier (sub-36:00) |
| 99 km (62 mi) | 3,120 m (10,200 ft) | Oct 106:00 AM GMT-7 | 20 hr | Starts from the Village at 6 a.m. Saturday and closes at 2 a.m. Sunday. Sold out for 2026 · WSER 2027 qualifier (sub-19:00) |
| 48.4 km (30 mi) | 1,339 m (4,400 ft) | Oct 108:00 AM GMT-7 | 10 hr | Starts from the Village at 8 a.m. Saturday on the race page and its time chart, though the event schedule prints 7:30; closes at 6 p.m. Sold out for 2026 |
About
Kodiak Ultra Marathons by UTMB is the UTMB World Series Major in Southern California, run out of Big Bear Lake in the San Bernardino Mountains over the second weekend of October. The 100 Mile starts at the Rim Nordic Ski Area at 1 p.m. on the Friday and climbs 16,000 ft over 100.3 miles, topping out near 10,000 ft on Sugarloaf Mountain, on a 36-hour limit. The 100K and 50K start from the Village of Big Bear Lake on the Saturday morning, and every race finishes there.
Entry is first come, first served, and all three ultras sold out for 2026. As a Major the race carries more Running Stones than most of the series, and the 100 Mile and 100K both count as Western States 100 qualifiers.
Course
The 100 Mile is a point-to-point from Rim Nordic to the Village, running through Camp Whittle, Doble Camp, Cactus Flats and twice over Sugarloaf before Bear Mountain and Snow Summit; cutoffs sit at Camp Whittle, Doble, Cactus Flats, Sugarloaf, Bear Mountain and Snow Summit. The 100K is an out-and-back from the Village to the Sugarloaf summit and back over Bear Mountain and Snow Summit, and the 50K loops from the Village over Snow Summit to Bluff Lake and Camp Osito. The race states the 100 Mile in miles and feet and the shorter races in kilometres and metres. The 100 Mile's 2026 chart re-measures the course from 2025, dropping the Holcomb Valley aid station and adding Van Dusen.
How to register
Registration is a direct sale on the race's site, first come, first served, and the race keeps no waiting list. Online entry closes the Sunday before the race or when a distance sells out, and the expo takes walk-up entries for any distance still open; there is no race-day registration. The 2026 ultras all sold out.