Sunday, April 5, 2020 • Santa Rosa, CA • Course Map
With more than 30 miles of trails that wind through its nearly 5,000 acres of wooded forests, hills, open meadows and occasional creeks and streams, Annadel State Park offers what organizers say is a “gnarly” half marathon trail run with plenty of hills and uneven terrain, as well as gorgeous views of the wildflowers that are just beginning to bloom in the spring.
Officially a fundraiser for the park, the Annadel Half Marathon marks its 9th annual this year, and welcomes a few hundred runners each year.
Runners follow mostly single-track trails through forested hills and meadows for most of the course, which follows an out-and-back route that starts and finishes at the swimming lagoon area of Spring Lake Regional Park, which lies adjacent to Annadel along its western edge.
From there, runners head out and make a clockwise loop through the park’s hills, starting out on the Spring Creek Trail and then heading into the park just after the first mile marker.
In addition to the 13.1-mile race and 10K, organizers also plan to host the 5K in conjunction with the Annadel Half Marathon. Like the half marathon, the 5K also is a fundraiser that will benefit the Sonoma County Regional Parks Foundation to build new trails in the regional parks.
Race Weather & Climate
Located in Northern California’s Sonoma County, just over 55 miles northwest of downtown San Francisco, Santa Rosa typically sees mild to moderately warm weather in April, a month that has seen record temperatures here as low as 28 degrees (in 1936) and as high as 98 degrees (in 1981).
On race day (April 5), the average low is 45ºF and the average high is 69ºF.
- 2019 Annadel Half Marathon Results
- 2018 Annadel Half Marathon Results
- 2017 Annadel Half Marathon Results
- 2016 Annadel Half Marathon Results
- 2015 Annadel Half Marathon Results
- 2014 Annadel Half Marathon Results
- 2013 Annadel Half Marathon Results
- $90 for the half marathon
- $70 for the 10K
- $60 for the 5K
To reserve your spot in the spring 2020 running of Santa Rosa’s Annadel Half Marathon or Kathy’s Race 5K, register online at RaceRoster.com here.
Official Race Website
Ever run in the Annadel Half Marathon? Share your impressions here, or post your review in the Comments below.