See backcountry hot springs and geysers, a National Historic Site, and Fairy Falls to boot on this attraction-packed loop. Begin with a hike to Sentinel Meadows, a grassy area speckled with thermal features, and the Queen’s Laundry Bathhouse, an unfinished building from 1881 that has been preserved by the thermal minerals. Then swing around to the south to follow Fairy Creek through more lush meadows. You’ll pass Spray Geyser and Imperial Geyser (the latter can erupt up to 60 ft.) before reaching Fairy Falls (see above). Reconnect with Fountain Freight Road and return to your trailhead. This area can be boggy and buggy in early summer, so pack your insect repellent.