Annadel Half Marathon, 10K & 5K

APR
17
2027
Trail running event on April 17, 2027 with a hilly half marathon, 10K and 5K, over 1500 ft of ascent and a cup-free policy.
Sat 17 Apr 2027
Half Marathon 10 kilometers 5 kilometers

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Annadel Half Marathon, 10K & 5K : April 17, 2027

The event is a trail running fundraiser held on April 17, 2027, offering multiple distances. Over the past 17 years the event has raised funds to improve the park and its surroundings.

Distances offered:

  • Half Marathon
  • 10K
  • 5K

The half marathon course is described as hilly and technical, with more than 1,500 feet of elevation gain over rocky and rooted terrain. The route begins at the Spring Lake Oak Knolls picnic area, winds through Spring Lake Park, and climbs into Annadel State Park, passing through green meadows, wildflowers, and a variety of trees.

The 5K follows an out-and-back routing that goes up a gravel fire road slightly into Annadel State Park. The 10K is listed as a separate distance though course details are not provided.

The event is organized as a non-profit fundraiser. It is cup-free; participants are asked to bring their own bottle or reusable cup. Visit the organization's website for the most recent information.

Half Marathon
Half Marathon
10 km
10k
5 km

Events nearby

Trail marathon, half, 10K, 5K and virtual options in Bothe-Napa Valley State Park on October 24, 2026; field limited to 300 participants.
A 6.45 mile trail race in Annadel State Park held as the 40th annual event with staggered starts, awards for the top 13, and limited registration to 100 runners.
Trail races at Bothe-Napa Valley State Park offering marathon, half marathon, 10K and 5K on single track trails with stream crossings and limited entries.
Trail races at Jack London State Historic Park on April 17, 2027 offering Half Marathon, 5.5 mile and 5K courses through vineyard views and Sonoma Mountain hills.
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