Date
Sat, 25 Sept 2027
Start
05:00
Venue
Lake Chabot Marina, Castro Valley, California
Castro Valley, Alameda County
Countdown
September
The 100 km version of a trail race that has run since 1983, point to point, with a 5 am start. Big day out, and a small field to share it with.
Key facts
0116.5-hour time limit
02Point to point, so plan how you get back to your start
03Starts at 5 am, so expect to run the first stretch in the dark
Create a free training plan for the Dick Collins Firetrails 100 km
7-day free trial, no card required
The course
The route
Castro Valley
Distance100km
Total climb3,140m
StartElevation
0 kmDrag map to rotate85.9 km
Weather
Late-September, Castro Valley
28°CTypical high
12°CTypical low
7°CColdest in 20 years
3%Days with rain
Highs around 28°C and lows around 12°C, but it has dropped to 7°C. Rain on 3% of days.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Jennifer Fralick4:48:0220.8 km/h
02Janna Bargy5:01:2119.9 km/h
03Naomi Jung5:23:2718.6 km/h
15
Women finishers
10:00:58
Median time
10.0 km/h
Median speed
Women · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Dick Collins Firetrails 100 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 Dick Collins Firetrails 100 km plan targets
Typical sessions
100 km with 3,140 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
Hill reps and vert to prepare the climbs and descents
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 Dick Collins Firetrails 100 km plan.
7-day free trial, no card required.
Other races at Dick Collins Firetrails
More events in September in United States
Bighorn RoadExpected Early September 2027 · Gypsum→Booneville Backroads UltraExpected Early September 2027 · Iowa→Gray Duck GritExpected Early September 2027 · Cannon Falls→The GRG EnduroExpected Early September 2027 · Saluda→Mad GravelSun, 5 Sept 2027 · Elbert→Mammoth Bar Trail RunsExpected Early September 2027 · Auburn→
