Beginning at Calero County Park, this trail run has everything! Experience awesome single track, great hills, and dirt paths. The 50K is a challenging, fantastic trainer for Western States that includes oak trees, exposure, good heat training, and panoramic vistas.
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. Click here for directions to Calero County Park. 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 Cutoff Times Pertains to Half Marathon + 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) Course Information & Maps Kids Run https://www.plotaroute.com/route/2433842 1 Mile https://www.plotaroute.com/route/2433841 5K https://www.plotaroute.com/route/2566716 10K https://www.plotaroute.com/route/2566718 15K (11:00am overall cutoff, 3 Hour Time Limit) https://www.plotaroute.com/route/2566722 Half Marathon (12:00pm, 4 Hour Time Limit) https://www.plotaroute.com/route/2566729 25K (1:00pm overall cutoff, 5 Hour Time Limit) Complete 13 Mile Course and then complete the 5K Course. https://www.plotaroute.com/route/2626190 Trail Marathon (4:00pm overall cutoff, 8 Hour Time Limit) Complete 13 Mile Course. Then Reverse 13 Mile Course. Done. https://www.plotaroute.com/route/2626195 50K (5:00pm overall cutoff, 9 Hour Time Limit) Complete 13 Mile Course. Then Reverse 13 Mile Course. Then Run out 2.5 Miles following orange ribbons and turn around at red ribbons. Done. 13 MILE COURSE: https://www.plotaroute.com/route/2566729 Bib Pick-Up/Registration will take place on race day. Race day registration available. Detailed course descriptions and maps are available at the following link: https://tctruns.com/calero-trail-run-winter/ Additional Information: Courses will be marked with ribbons, signs & gypsum. 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 rd@tctruns.com if you have any questions.
Dec 05, 2026
Distance — 1K
Type — Running
07:30
$25.00
Dec 05, 2026
Distance — 10K
Type — Running
08:00
$65.00
Dec 05, 2026
Distance — 15K
Type — Running
08:00
$75.00
Dec 05, 2026
Distance — 25K
Type — Running
08:00
$95.00
Dec 05, 2026
Distance — 50K
Type — Running
08:00
$115.00
Dec 05, 2026
Distance — 5K
Type — Running
08:00
$55.00
Dec 05, 2026
Distance — 21.1K
Type — Running
08:00
$85.00
Dec 05, 2026
Distance — 1.6K
Type — Running
08:00
$30.00
Dec 05, 2026
Distance — 42.2K
Type — Running
08:00
$105.00
These values represent the 3-year monthly averages for December in San Jose.
Learn more about the host city, San Jose.
Often called "the capital of Silicon Valley", San Jose is the largest city in the Bay Area, 3rd largest in California, and the 12th largest city in the United States, with a population of over 997,000 residents as of 2024. It was named the 6th safest big city in the U.S. in 2015. This clean, sprawling metropolis has sports, beautiful vistas, and ethnic enclaves and bleeds into the greater Bay Area for travelers who want to take their time in Northern California.
Read more launchAll-time top performances and historical records for Calero Trail Run - Winter.
| Place | Name | Year | Time | |
|---|---|---|---|---|
| 🥇 | Oliver Kaard | '25 | 4:06:12 | |
| 🥈 | Jonathon Hazell | '24 | 4:32:54 | |
| 🥉 | James Dillon | '25 | 5:29:00 | |
| 4 | Sean Curry | '24 | 5:46:53 | |
| 5 | Arnau Bajona | '25 | 5:49:00 | |
| 6 | Matthew McComish | '24 | 5:52:34 | |
| 7 | Stephen Sims | '23 | 5:59:56 | |
| 8 | Daniel Olsson | '25 | 6:03:12 | |
| 9 | Ezher Salihbasic | '23 | 6:07:12 | |
| 10 | David Astrue | '24 | 6:07:22 |
Read what other athletes have to say about their experience at the Calero Trail Run - Winter.
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