Sundrop Sauna

5684 Lakeville Hwy, Petaluma, CA 94954, Petaluma, CA

Sundrop Sauna sits along the Petaluma River at Lakeville Landing Marina, just over the Marin line in the North Bay. After running as a pop-up, it opened a permanent home in August 2024, building a relaxed, marina-side Nordic sauna experience around the water's edge. The site offers a communal sauna, a cold plunge, outdoor showers, and outdoor lounges where guests can rest between rounds. Sessions run about 90 minutes for up to eight people and are priced around $45, making it one of the more affordable and social ways to sweat and plunge in the region. With its rustic, community-minded feel and waterfront setting, Sundrop draws groups and regulars who want an unpretentious, outdoor-first take on contrast therapy. The emphasis is on shared sessions, fresh air, and easy access to cold water right by the river.