The Green Fire Tour is mostly for wildlife viewing and sightseeing, but there were a couple of opportunities for short hikes. 

The Grand Prismatic Overlook trail is a short, moderately easy hike (about 1.2 miles round trip) that climbs to a boardwalk viewpoint offering stunning aerial views of Yellowstone’s largest hot spring, with its vivid rainbow-like colors. From the same trailhead, you can continue on to Fairy Falls, a 200-foot waterfall tucked into the forest, for a roughly 5-mile round-trip hike on a flat, wooded path. Together, the overlook and Fairy Falls make a rewarding combination of geothermal wonders and classic Yellowstone scenery. Here are some pics from this hike.