Trione-Annadel State Park, State park in Sonoma County, California.
The 5,092-acre park contains oak woodlands, volcanic formations, seasonal streams, meadows, redwoods, grasslands, and a 26-acre lake with diverse ecosystems.
Established in 1971, the park includes Wymore Quarry, which supplied cobblestones for San Francisco construction projects from the late 1800s through the 1920s.
The park's extensive network of 40 miles of trails attracts local communities for hiking, mountain biking, and horseback riding throughout the year.
Lake Ilsanjo provides opportunities for fishing, with anglers over 16 required to obtain a California fishing license to catch bluegill and bass.
The park hosts rare California red-legged frogs in Ledson Marsh, the same species featured in Mark Twain's famous Calaveras County jumping frog story.
Location: Sonoma County
Inception: 1971
Phone: +17075393911
Website: http://parks.ca.gov/?page_id=480
GPS coordinates: 38.42920,-122.62500
Latest update: March 11, 2025 12:20
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