Calero Trail Run - Winter

Trail1 Mile10 km15 km25K50K5 km21.1 kmKids RunTrail MarathonOpen
Saturday, December 5, 2026
Registration closes Dec 4
Calero County Park, San Jose, CA, USA
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About the race

Beginning at Calero County Park, this trail run offers single track, hills, and dirt paths.

The 50K is a challenging trainer for Western States, with oak trees, exposure, heat training, and panoramic vistas.

Venue and getting there

Address:
Calero County Park
23205 McKean Road
San Jose, CA 95120
Please make sure you are going to the right place, as some searches for Calero in GPS will route you to the reservoir boat launch ramps. That is not where we will be setup.
DO NOT GO to the Calero Park Reservoir Entrance.
Calero Park is located off McKean Road. Traveling to the park, from central San Jose, take Almaden Expressway south. Turn right onto Harry Road, then left onto McKean Road. From 101, exit on Bailey Avenue and head west until you reach McKean Road. Turn left onto McKean Road. Calero Park entrance and parking lot are on the right side 0.5 mile.

Race day schedule

  • 7:00 AM — Registration opens & Bib Pick-Up
  • 7:30 AM — Start of Kids Race
  • 7:45 AM — Trail briefing
  • 8:00 AM — Start of all other race distances

Registration and bib pick-up

Bib Pick-Up/Registration will take place on race day. Race day registration available.

Additional information

  • Please dress appropriately for an endurance run.
  • All finishers will receive a commemorative medal.
  • Aid stations will be available.
  • Please do not hesitate to e-mail us at [email protected] if you have any questions.

What your entry includes

Commemorative medal
All finishers will receive a commemorative medal.

The course

1 Mile10 km15 km25K50K5 km21.1 kmKids RunTrail Marathon

50K

50kTrail
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Cut-off5:00pm overall cutoff, 9 Hour Time Limit · A challenging trainer for Western States.

Trail Marathon

50kTrail
trail marathonTrail
Cut-off4:00pm overall cutoff, 8 Hour Time Limit

25K

50kTrail
trail marathonTrail
Cut-off1:00pm overall cutoff, 5 Hour Time Limit

Half Marathon

50kTrail
trail marathonTrail
Cut-off12:00pm, 4 Hour Time Limit

15K

50kTrail
trail marathonTrail
Cut-off11:00am overall cutoff, 3 Hour Time Limit

10K

50kTrail
trail marathonTrail

5K

50kTrail
trail marathonTrail

1 Mile

50kTrail
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Kids Run

50kTrail
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Cutoff times for Half Marathon and up

  • Mile 13 — 12:00PM
  • Mile 17 – 1:00PM
  • Mile 21 (Rancho Aid Station) – 2:20PM
  • Mile 26 – 4:00PM
  • Mile 28.5 – 4:30PM
  • Mile 31 – 5:00PM (RACE OVER)

Race weekend schedule

7:00 AM
Registration opens & Bib Pick-Up
7:30 AM
Start of Kids Race
7:45 AM
Trail briefing
8:00 AM
Start of all other race distances

Location

City insight: San Jose

San Jose is the most populous city in the San Francisco Bay Area and Northern California, and the county seat of Santa Clara County. It sits in the Santa Clara Valley on the southern shore of San Francisco Bay and was founded in 1777 as the first city in the Californias. The climate is Mediterranean, with dry, mild summers and cool, wet winters, so spring and autumn are the best seasons to race.

Know from the athletes

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Dec 5, 2026
Calero Trail Run - Winter
From $25
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