Date
Sat, 5 Dec 2026
Start
08:00
Venue
Calero County Park, 23205 McKean Rd, San Jose, CA 95120
San Jose, Santa Clara County
Countdown
December
A friendly 5K out and back on dirt with only gentle climbing. Run to the green ribbons, turn, and come home. A good first trail race.
Key facts
01Out-and-back: turn around at the green ribbons
Create a free training plan for the Calero Trail Run (Winter) 5 km
7-day free trial, no card required
The course
The route
San Jose
Distance5km
Total climb77m
StartElevation
0 kmDrag map to rotate5.0 km
Weather
Early-December, San Jose
16°CTypical high
6°CTypical low
-2°CColdest in 20 years
26%Days with rain
Highs around 16°C and lows around 6°C, but it has dropped to -2°C. Rain on 26% 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
01Neha Satpute00:37:108.1 km/h
02Ellie Chen00:39:227.6 km/h
03Lily Aguilar00:40:107.5 km/h
6
Women finishers
0:42:19
Median time
7.1 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
OrganiserTroy's California Trail Runs
Websitetctruns.com
Instagram@troyscaliforniatrailruns
Running since2012
Training
Training for the Calero Trail Run (Winter) 5 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 Calero Trail Run (Winter) 5 km plan targets
Typical sessions
5 km with 77 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 Calero Trail Run (Winter) 5 km plan.
7-day free trial, no card required.
Other races at Calero Trail Run (Winter)
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