Tomales is a small coastal town located in Marin County, California. It enjoys a Mediterranean climate characterized by mild, wet winters and warm, dry summers. The average annual temperature in Tomales ranges from around 50°F (10°C) to 70°F (21°C). The area experiences moderate rainfall, with the wettest months being December to February.

Tomales is surrounded by diverse hydrology constituents. It is situated near the Tomales Bay, a narrow, elongated coastal inlet that provides habitat for a variety of wildlife, including harbor seals and a wide array of bird species. The bay is fed by several creeks, such as Walker Creek and Lagunitas Creek, which contribute to the hydrological system of the area.

Outdoor recreation opportunities in Tomales are abundant. The Tomales Bay State Park offers scenic hiking trails, camping facilities, and opportunities for kayaking and canoeing in the bay. The nearby Point Reyes National Seashore is a haven for nature enthusiasts, providing opportunities for hiking, birdwatching, whale watching, and beachcombing. Additionally, Tomales Bay is popular among anglers, who can enjoy fishing for salmon, halibut, and rockfish. The picturesque landscapes and diverse ecosystems make Tomales an appealing destination for nature lovers and outdoor adventurers.