Great Fountain Geyser Visiting Yellowstone Park in the summer, you'll want to devote at least a half day to a walk past the many different and beautiful hydrothermal features in Upper Geyser Basin. While out in the basin, plan on waiting for an eruption of one of the geysers that are predictable but not always dependable.
For Grand Geyser, you may have to wait two hours or more. But I've never heard of anyone being disappointed by Grand. Recently, it erupts about every 7 to 10 hours and may go to 200 feet (60 m). Don't leave after the first exciting burst of raw natural energy . . . " [More]
Three miles east of Fishing Bridge Junction is the trailhead for the Storm Point Nature Trail. Rangers lead group walks here daily all summer, or you can go on your own and see the many birds and the beautiful shore of Yellowstone Lake.
"Yellowstone guidebooks (the first one appeared in 1873) are legion. Janet Chapple's 'Yellowstone Treasures' (Providence: Granite Peak Publications, 2002) is my recent favorite in this category. The most important of the earlier ones are Haynes Guide. . . ."
—Lee Whittlesey, Bibliographical Essay, Storytelling in Yellowstone (2007)