Date
Sat, 12 Dec 2026
Start
07:30
Venue
Cool Staging Area, 7200 Saint Florian Court, Cool, CA 95614
Cool, El Dorado County
Countdown
December
The half marathon version of Doomsday: a gentle 22 km loop with only 380 m of climbing. A friendly way in, and walkers are welcome.
Key facts
015-hour cutoff
02One aid station, at mile 8.88
03Hikers welcome; trekking poles allowed
Create a free training plan for the Doomsday 22 km
7-day free trial, no card required
The course
The route
Cool
Distance22km
Total climb381m
StartElevation
0 kmDrag map to rotate21.5 km
Weather
Mid-December, Cool
14°CTypical high
5°CTypical low
-6°CColdest in 20 years
38%Days with rain
Highs around 14°C and lows around 5°C, but it has dropped to -6°C. Rain on 38% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2025 results
Who finishes, and how
#RiderTimeAvg speed
01Margaux Sindoni02:03:3110.5 km/h
02Christine Arneson02:05:1110.4 km/h
03Melanie Meadows02:10:0710.0 km/h
33
Women finishers
3:04:41
Median time
7.0 km/h
Median speed
Women · 2025 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Doomsday 22 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Doomsday 22 km plan targets
Typical sessions
22 km with 381 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Doomsday 22 km plan.
7-day free trial, no card required.
Other races at Doomsday
More events in December in United States
Calero Trail Run (Winter)Sat, 5 Dec 2026 · San Jose→Colossal Vail 50/50Sat, 5 Dec 2026 · Vail→Peacock Gap Trail RunSat, 5 Dec 2026 · McNears Beach→San Joaquin River Trail 10k/25k/50kSat, 5 Dec 2026 · New York→The Hitchcock ExperienceSat, 5 Dec 2026 · Honey Creek→Wildwood Trail MarathonExpected Early December 2026 · Wildwood→
