Dr. Wilkinson's Backyard Resort & Mineral Springs

Dr. Wilkinson's Backyard Resort & Mineral Springs sits on Lincoln Ave in Calistoga, drawing on the town's geothermal water since 1952. The core of the experience is the trio of mineral pools: a cooler 85°F spring, a middle 95°F warm spring, and a 104°F hot spring set aside as an adults-only area. Mud baths are part of the package as well, continuing the resort's long-running reputation for them.

Beyond the water, the property works as a small wine-country retreat with several room types — mid-century king rooms, private bungalows, and a Victorian House with bunks suited to families. House of Better, the on-site restaurant, serves Southwest-inspired food, herbal drinks, Napa Valley wines and poolside service, so a soak can turn into a longer stay without leaving the grounds.

Access is split between overnight guests and day visitors. A day pass is available, which is the way to use the pools and mud baths without booking a room, though some amenities are reserved for hotel guests, so it's worth confirming what's included before you go. The resort falls in the upscale price tier, consistent with its blend of lodging, dining and spa facilities rather than a bare-bones soak. It suits couples, families and groups equally, from a quiet pool afternoon to a wedding party booking out rooms and pool time together.

Given Calistoga's concentration of hot springs and nearby wineries, Dr. Wilkinson's works well as a base for exploring the area, with the mineral pools and mud baths as the main draw rather than an extensive spa menu.