Calero Trail Run
The Calero Trail Run series offers a challenging escape into nature with multiple distances.
Race Date
Dec 5, 2026
Location
San Jose, CA
Quick facts
- Date
- Saturday, December 5, 2026
- Location
- San Jose, California
- Distance
- Half marathon (13.1 mi) + 50K, 26.2M, 25K, 15K, 10K, 5K trail run
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
The Experience
The Calero Trail Run series invites runners to explore the rugged beauty of San Jose, California. With a variety of distances from 5K to 50K, including a marathon, it caters to a wide range of trail enthusiasts.
The courses are designed to test participants with varied terrain, promising an authentic trail running experience. Runners can expect a challenging yet rewarding day out amidst the natural landscape.
This event is a draw for those seeking a destination race, attracting participants from across the region and beyond. The steady field trend suggests a loyal following for this established trail event.
Race-provided description
Home Results Beta Event Finder News Store Gift Cards Help Contact SIGN IN CART Twitter Facebook Instagram    Tiktok Events Participants SIGN IN CART Events Participants Home Results Beta Event Finder News Store Gift Cards Help Contact // // .cssmenu ul { text-transform: uppercase; } .cssmenu { background-color: #333; overflow: hidden; border-bottom: 4px solid #5CA921; } .cssmenu a { float: left; display: block; color: #f2f2f2; text-align: center; padding: 12px 14px; text-decoration: none; font-size: 12px; text-transform: uppercase; } .cssmenu a.topmenuitem:hover { background-color: #5CA921; color: #fff; } .cssmenu .icon { display: none; } .cssmenu ul:after { content: ''; display: block; clear: both; } .cssmenu ul, .cssmenu li { list-style: none; margin: 0; padding: 0; } .dropdown-c
Course Info
Course Type
Loop Course
Terrain
trail
Surface
Dirt Trail
Difficulty
Rolling Hills
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Course Map
8 other maps for this race
- Plot a Route— https://www.plotaroute.com/route/2433841
- Plot a Route— https://www.plotaroute.com/route/2566716
- Plot a Route— https://www.plotaroute.com/route/2824535
- Plot a Route— https://www.plotaroute.com/route/2824549
- Plot a Route— https://www.plotaroute.com/route/2824566
- Plot a Route— https://www.plotaroute.com/route/2824570
- Plot a Route— https://www.plotaroute.com/route/2824575
- Plot a Route— https://www.plotaroute.com/route/2824578
Quality Score
first year
no finisher counts yet
small race — neutral
needs a few years of results
3 timing sources · 8 photos
no finisher data yet
no winner time yet
typical high 70°F
Race Day Weather
5-year historical avgStart (Low)
54°
Afternoon (High)
80°
Warm — hydration strategy is key, start conservatively
0.0"
Precipitation
14 mph
Wind
57%
Humidity
Race Photos
Frequently asked
When is the Calero Trail Run?
The Calero Trail Run is held on Saturday, December 5, 2026.
Where does the Calero Trail Run take place?
It takes place in San Jose, California.
What distances does the Calero Trail Run offer?
The half marathon (13.1 miles), plus 50K, 26.2M, 25K, 15K, 10K, 5K trail run.
Is the Calero Trail Run course flat and good for a PR?
The Calero Trail Run is a rolling hills, loop course course.
HalfRuns editorial — independent, no paid placement.
Explore More Journeys
Can't make it to San Jose? Discover other experiences that match your running style.
Search All Races
