Sonoma Sun Event Calendar

Annadel Half Marathon Trione-Annadel State Park

Saturday April 8th - 8:00am

Trione-Annadel State Park’s premiere running event, the Annadel Half Marathon, comes to the park on April 8, start time 8 a.m. The course is hilly and technical, designed for the experienced trail runner looking for a challenge. It is a tough course with over 1,500 feet of elevation gain, but it winds through gorgeous scenery with green meadows, wild flowers, and a variety of beautiful trees.

There will also be a 5K course offered this year. Both races wrap up with an after-race celebration at Spring Lake Regional Park near the swimming lagoon. Half Marathon Registration is $75 or $85 after April 1. 5K registration is $40 or $45 after April 1. Registration is open now. Visit for more information.