Napa Valley Trail Marathon

MAR
20
2027
Trail marathon, half, 10K and 5K through Bothe-Napa Valley State Park on March 20, 2027, limited to 300 participants with marked single track routes.
Sat 20 Mar 2027
26 miles Half Marathon 10 kilometers 5 kilometers

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Napa Valley Trail Marathon, Half Marathon, 10K & 5K : 2027

The 35th annual Napa Valley Trail event takes place on March 20, 2027 at Bothe-Napa Valley State Park in Saint Helena, California. The event is limited to 300 participants and features trail races over multiple distances.

Distances

  • Marathon
  • Half Marathon
  • 10K
  • 5K

The courses run on lush single track through the state park, with hills, stream crossings and rocky sections. The 10K is a single loop. The Half Marathon repeats the 10K loop twice. Marathoners run the 10K loop, pass the start/finish area, then complete a roughly 4-mile out-and-back to the Old Bale Grist Mill; that 10K-plus-extension pattern is repeated twice before a final 10K loop.

Course markings use orange ribbon at turns and trail crossings. There is one aid station at the start/finish area; half marathoners encounter it once between loops, and marathoners at approximately miles 6, 10, 16 and 20. Participants are advised to carry personal hydration. The course cut-off time is 6 hours; hikers and walkers are permitted.

Athlete check-in is available before the race for bib pickup and distance changes; bibs are mailed beginning two weeks before the event. Safety pins and course maps are provided at check-in. T-shirts are provided to all participants, finisher medals are awarded for the full and half marathons, and personalized award ribbons for top three male and female finishers in each age group will be mailed after the race.

Parking within the park requires a $10 vehicle fee; free overflow parking is available along Highway 29 where legal. Headphones and other audio devices are not allowed on course due to narrow trails and steep drop-offs. Visit the organization's website for the most recent information.

26 mi
Marathon
Half Marathon
Half Marathon
10 km
10k
5 km

Events nearby

Trail races at Lake Sonoma on October 17–18 2026 offering 100, 50, marathon, half and relay options with significant elevation and staffed aid stations.
Trail marathon, half, 10K, 5K and virtual options in Bothe-Napa Valley State Park on October 24, 2026; field limited to 300 participants.
The 40th annual Annadel Loop is a 6.45 mile trail race in Annadel State Park with staggered starts, awards for the top 13, a limited field, and published member and non member fees.
Trail event in Middletown CA on March 7 2027 offering Half Marathon, 10K and 5K with camping, awards, and proceeds benefiting trail development and charity.
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