The Napa Wilderness Trail Runs, hosted by Bay Trailrunners, are set in the ruggedly beautiful Skyline Wilderness Park in Napa, California. Scheduled for Saturday, May 16, 2026, this event marks its 5th year at this location, offering a range of distances from a beginner-friendly 10k to a "beast" 50k ultra-marathon. The courses are known for their steep ascents up the Rim Rock Trail, providing panoramic views of the Napa Valley, Mount Diablo, Mount Tamalpais, and Mount Saint Helena.
Race Categories and TimingThe event features four primary distances with staggered start times. All races originate from the south gate overflow parking area of Skyline Wilderness Park.
| Category | Start Time | Time Limit | Difficulty |
|---|---|---|---|
| 50K Ultra | 7:00 AM | 10 Hours | Advanced / "The Beast" |
| 30K Trail | 7:15 AM | 8 Hours | Challenging / Technical |
| 21K (Half) | 7:45 AM | 6 Hours | Moderate / Training Level |
| 10K Trail | 8:00 AM | 4 Hours | Beginner / Entry Level |
Skyline Wilderness Park offers technical terrain that requires preparation, especially for the longer distances.
Skyline Wilderness Park serves as an all-encompassing venue with amenities for both runners and their families.
The technical nature of the Skyline trails makes for rigorous course times. Ryan Emory holds a leading performance from 2023 with a 50k finish of 5:07:32. More recently, Ben Wiley recorded a 5:10:44 finish in 2025, underscoring the consistent challenge of the Rim Rock route.
May 16, 2026
Distance — 50K
Type — Running
07:00
$149.00
May 16, 2026
Distance — 30K
Type — Running
07:15
$139.00
May 16, 2026
Distance — 21K
Type — Running
07:45
$119.00
May 16, 2026
Distance — 10K
Type — Running
08:00
$89.00
These values represent the 3-year monthly averages for May in Napa.
Learn more about the host city, Napa.
Napa is a city in the state of California, located 50 miles north of San Francisco, at the southern end of scenic Napa Valley.
Read more launchWatch highlights and course previews from previous years.
Read what other athletes have to say about their experience at the Napa Wilderness Trail Runs.
Be the first to share your experience with the community!
Explore other exciting events happening in this same region.
location_on Winters, California, US
calendar_today May 17, 2026
Hand-picked events we think you’ll love.
Nov 21, 2026
The RUN Manatee 5k series offers THREE adventures to celebrate ONE community. Participants will discover Manatee County…
Read more
Nov 28, 2026
Join us for the annual Turkey Trails 5k/10k! A fun, Thanksgiving-themed event that is perfect for the whole family.The…
Read more
Dec 13, 2026
Join us for the annual Candy Cane Course 5k/12k! A fun, Christmas-themed event that is perfect for the whole family.Th…
Read more
Mar 21, 2027
WE ARE NOW OFFERING AN AQUABIKE DIVISION! Triathlon Information:Join us for the annual Space Coast Triathlon, held in …
Read more