Trione-Annadel State Park

Sonoma County, California · State Park

A 5,000-acre state park near Santa Rosa featuring oak woodlands, grasslands, and volcanic rock formations, popular for hiking, mountain biking, and horseback riding around Lake Ilsanjo.

Current alerts

• California State Parks in cooperation with the CAL FIRE Sonoma-Lake-Napa Unit plans to conduct a series of intermittent pile burns at Trione-Annadel State Park, as soon as Monday, February 10, 2025, and continuing Mondays-Thursdays through the winter and early spring months as conditions permit.

Top trails

• Canyon Trail to Spring Creek Trail Loop — 7.4 mi · 913 ft gain · 2h 55m · Loop
• Marsh Trail — 4.2 mi · 572 ft gain · 1h 42m · Loop
• Ridge Trail — 4.1 mi · 329 ft gain · 1h 32m · Out & back
• Lawndale Trail — 2.8 mi · 740 ft gain · 1h 19m · Out & back
• Cobblestone Trail — 2.3 mi · 105 ft gain · 49m · Out & back

More trails here: South Burma Trail, Rough-Go Trail, Schultz Trail, North Burma Trail.

Coordinates: 38.4522, -122.6346.

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