Events at Lake Sonoma Lake Sonoma Steelhead Run Tours From January through April, guided tours for school children and other groups are available weekdays by appointment. Self-guided tours are available every day. The fish hatchery sorts fish daily and does its artificial spawning on Thursday mornings. To watch the magnificent steelhead push their way up Dry Creek to the fish ladder to spawn the next generation of fish, come out to the park or call 707-431-4533 to make an appointment for a guided group tour! Tours are free. Bike Monkey SoNoMas Race -- April 1, 2017 One of the most challengiing bike races anywhere! SoNoMas will be held at Lake Sonoma on Saturday, April 1. This event is sponsored by Bike Monkey. Come check out the action! Earth Day (times two!) -- April 21 and 22 Lake Sonoma will celebrate Earth Day 2017 twice -- Friday and Saturday, April 21 and 22. A park ranger will lead a three- to four-mile hike departing from the Lone Rock parking area at 9:55 a.m. on Friday, April 21. Cameras, sturdy tennis shoes and walking sticks are advised. The hike will follow the loop trails on the ridgeline of Half-A-Canoe Trail. On Saturday, April 22, it's Earth Day Family Fun at Lake Sonoma! Beginning at 10:30 a.m., volunteers will be reading "Earth Day, Birthday" with assistance from 12 animal friends. There will be arts and crafts projects -- and a level, one-mile hike will depart at 10:45 a.m. from the Lone Rock parking area. A second hike will depart at the Woodland Ridge trail marker near the Milt Brandt Visitors Center at 1:05 p.m. All activities are free and day use fees will be waived for participants. IronMan 70.3 Santa Rosa -- May 13, 2017 Lake Sonoma will host the start of the IronMan 70.3 Santa Rosa race on Saturday, May 13. The swim loop begins at the public boat ramp. Pro start is 6:25 a.m., followed by the age group athlete start at 6:40 a.m. Participants will then grab their bikes and start the grueling route to the finish line at Courthouse Square in Santa Rosa! Sonoma Wine Country Games -- June 10-11, 2017 The archery component of the Sonoma Wine Country Games (also called the Senior Games) will be at the beautiful Lake Sonoma Archery Range in 2017. The Modified Flint Round will begin at 9 a.m. on Saturday, June 10th. The Field/Hunter Round begins on Sunday the 11th, also at 9 a.m. If you're 50+, you're welcome to compete in a wide variety of different games. For more information and to register, go online to winecountrygames.com. Lake Sonoma Steelhead Festival -- February 10, 2018 This great free event will be held Saturday, February 10, 2018, at the Milt Brandt Visitors Center. Festivities begin at 10 a.m. and run until 4 p.m. This event is hosted by the Friends of Lake Sonoma, the U.S. Army Corps of Engineers, the Sonoma County Water Agency and the California Department of Fish and Wildlife. For more information, please refer to the Lake Sonoma Steelhead Festival Page under "Support Lake Sonoma" on this website. Want to hold an event at Lake Sonoma? Lake Sonoma is the perfect venue for all kinds of events, ranging from family reunions to mountain bike racing. Fees for venue rental are set by the U.S. Army Corps of Engineers, but if you're planning an event, you can designate the Friends of Lake Sonoma as an event sponsor and your fees will then be a donation -- with all funds returned directly to the park in support of programs and maintenance. To hold an event, contact the USACE at 707-431-4590 and mention to the park ranger that you would like to partner with the Friends of Lake Sonoma. It's as simple as that!