Rocky Ridge
Rocky Ridge Half Marathon: 4,000 feet of climbing in Las Trampas Wilderness.
Race Date
Sep 19, 2026
Location
san Ramon, CA
Quick facts
- Date
- Saturday, September 19, 2026
- Location
- san Ramon, California
- Distance
- Half marathon (13.1 mi) + 6.21 Miles, 3.1 Miles, 13.1 Miles
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
- Finishers on record
- 2,713
Highlights
Good For
Atmosphere
Course
The Experience
Rocky Ridge is the punishing finale of Brazen Racing's Ultra Half Series, held in Las Trampas Regional Wilderness near San Ramon. With a modest field of around 200 runners and a 37% repeat rate, this race attracts a loyal crew of trail masochists. The course is an unrelenting figure-8 loop that clocks in at nearly 14 miles—much of it steep, rocky singletrack.
The elevation gain totals almost 4,000 feet, with climbs like Del Amigo that have runners questioning life choices. But the payoff is spectacular: sweeping views of Mount Diablo and the East Bay. As one runner notes, "This is the race your momma warned you about!" The terrain is entirely unpaved, demanding strong legs and even stronger willpower.
Finishers earn a unique metal coaster (on top of standard bling) and lifetime bragging rights. The race also features $10,500 in cash prizes—though most runners are just happy to survive. Rocky Ridge is a bucket-list challenge for trail lovers and a fitting capstone for the Ultra Half Series.
Race-provided description
This is the race your momma warned you about! The half marathon cannot be described as "flat and fast" or "good for beginners" or with any other nice phrase. In fact, the phrases most commonly used to describe it would be unprintable. But...once you finish the course, you will have experienced trails and seen views that few others ever will. And you will have a lifetime of bragging rights! The 10K and 5K are not quite as intense as the half marathon, but don't worry, those runners will also be challenged with some hills and rewarded with some rarely-seen vistas. If you are one of those brave souls ready to face either victory occasion and face this beast, come join us on September 19, 2026!
Logistics
Race Day
Saturday, September 19, 2026
Start Time
7:30 AM
Giveaway
Race Shirt
Start Location
18012 Bollinger Canyon Rd, san Ramon, CA, 94583
Course Info
Course Type
Loop Course
Terrain
trail
Scenery
Mountain, Forest
Surface
Dirt Trail
Difficulty
Mountainous
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
Solid Pick6016 years running
~228 finishers a year
shrinking
37% returning runners
6 timing sources
runners from 2 states
winner 2:12:54
typical high 78°F
Race Day Weather
5-year historical avgStart (Low)
55°
Afternoon (High)
78°
Warm — hydration strategy is key, start conservatively
0.0"
Precipitation
9 mph
Wind
74%
Humidity
Historical Finish Times
How 2,713 finishers actually crossed the line across 16 years.
Most recent
2025
Total finishers
2,713
Median time
3:35:22
Latest turnout
107
States
22
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
Frequently asked
When is the Rocky Ridge?
The Rocky Ridge is held on Saturday, September 19, 2026, starting at 7:30 AM.
Where does the Rocky Ridge take place?
It takes place in san Ramon, California.
What distances does the Rocky Ridge offer?
The half marathon (13.1 miles), plus 6.21 Miles, 3.1 Miles, 13.1 Miles.
Is the Rocky Ridge course flat and good for a PR?
The Rocky Ridge is a mountainous, loop course course.
How many people run the Rocky Ridge?
HalfRuns has finish records for 2,713 runners who have completed the Rocky Ridge.
HalfRuns editorial — independent, no paid placement.
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