About Semi-Centennial Geyser
Semi-Centennial Geyser is a powerful hot spring nestled in the rugged wilderness of Yellowstone National Park, Wyoming. Its scalding waters, reaching temperatures near 198°F, create an intense steam cloud that rises dramatically, offering a striking natural display. This primitive hot spring captivates with its raw geothermal energy and dynamic eruptions.
Getting There
Located between Mammoth Hot Springs and Norris Junction, access requires careful navigation along backcountry trails. There is no formal parking lot nearby; you must hike over uneven terrain through forested areas to reach the site. Prepare for a moderately challenging trek with limited signage.
What to Expect
Expect steamy bursts and boiling water served by this fiery geyser amidst a serene forest setting. The area remains relatively quiet, attracting visitors drawn to Yellowstone’s more remote geothermal features. Facilities are absent here, and the environment is preserved in its natural state.
Tips for Visitors
Wear sturdy hiking boots and carry plenty of water for your journey on potentially slippery trails. Visit during cooler parts of the day to avoid intense heat combined with physical exertion. Follow park regulations closely—stay on marked paths and maintain a safe distance from the dangerously hot water. Semi-Centennial Geyser offers a uniquely raw encounter with Wyoming’s geothermal wonder, unlikely to accommodate casual swimmers or relaxed soaking.