At a glance
- Last held
- May 30, 2026
- Next edition
- 2027 date not announced. Usually held in May.
- Location
- San Jose, California
- Distances
- 50K, Marathon, 25K, Half Marathon, 15K, 10K, 5K
- Aid stations
- 2, 1 with crew access
Listed from UltraSignup. Checked Apr 19, 2026.
Plan this race for free
2 aid stations are already loaded. Add cutoffs, pacing and the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planAbout this race
Trail run at Calero County Park featuring single track, hills, dirt paths, oak trees, exposure, and panoramic vistas. The 50K serves as a challenging trainer for Western States.
Key dates
Race day
May 30, 2026
Pricing
Current price
$125
50K
Price progression
Kids Run
$25
1 Mile
$30
5K
$55
10K
$65
15K
$75
Half Marathon
$85
25K
$95
Trail Marathon
$115
50K
$125
Email me updates about Calero Trail Run - Spring
Registration openings and major changes, like a new date or a cancellation.
Aid stations
2| Station | Distance | Crew | Drop bags | Cutoff | Supplies |
|---|---|---|---|---|---|
Calero Start/Finish Line Aid Station Available before and after races | 0.00 miles | -- | -- | ||
Rancho Canada del Oro Aid Station Accessible to crews, has one commode available first-come first-served | 3.80 miles | -- | water |
Entry transfers
Can't race, or need an entry? Post it here so nobody has to ask if it's still available.
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Race planning
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