Anderson Marsh State Historic Park sits along the southeastern shore of Clear Lake in Lower Lake, California, protecting 1,298 acres of oak woodland, tule marsh, and open grassland in Lake County. This state historic park stands apart for its layered history — the land holds one of the oldest known sites of continuous human habitation in California, with evidence of Southeastern Pomo settlement stretching back over 10,000 years.

The park’s centerpiece is the restored Anderson Ranch House, a Victorian-era homestead that tells the story of the Scottish ranching family who worked this land in the 1800s. Guided tours of the ranch complex offer a window into both the agricultural history and the far deeper indigenous heritage of the area.

Trails wind through the property connecting oak-studded hills to the marshlands along Clear Lake’s edge. The Cache Creek Nature Trail and the Marsh Trail are favorites for birdwatching — the wetlands attract herons, egrets, white pelicans, and migrating waterfowl in impressive numbers. Spring wildflower displays across the grasslands are particularly rewarding from March through May.

The park is a day-use area with no camping facilities on-site, but nearby Clear Lake State Park offers developed campsites just a short drive away.

Fall and spring are the best seasons to visit. Summers in Lake County run hot, and the marshlands can dry considerably. Winter brings cooler temperatures and the return of migratory birds. With a 4.3-star rating across 405 reviews, visitors consistently praise the peaceful trails and rich natural setting that make this park a quiet gem worth seeking out.