Monument Geyser Basin is an active hydrothermal area that most visitors to Yellowstone National Park won’t get to see. That’s because most visitors won’t pursue the 2.8-mile round trip hike required to reach the basin. There is 700 feet of elevation gain standing in the way, as the trail climbs a pine-covered mountainside with views of Mount Holmes and a snaking section of the Gibbon River. Unlike more notable geyser basins in the park, no boardwalk restricting where visitors are allowed to walk at Monument Geyser Basin. This gives hikers the freedom to carefully explore the steam vents and pools as they wish.
The trail is level at the start, allowing you to warm up for the upcoming ascent. For almost half a mile, the trail travels beneath a canopy of pines along the west bank of the Gibbon River. Grand Loop Road (the route to the trailhead) follows the east bank, and is the only manmade intrusion in sight.
After heading north up a relatively straight stretch of the river, the trail turns west and shoots uphill, climbing 650 feet over the next 0.8 miles to reach Monument Geyser Basin. The steep dirt track passes through a forest of shorter pines that are regrowing from a past wildfire. The young lodgepoles allow over-the shoulder views of the Gibbon River as it weaves through a meadow to the north, looking quite like a snake. Norris Geyser Basin is partially visible in the forest farther north, and Mount Holmes rises to the northwest. This gives you plenty to look at whenever you stop to catch your breath.
About a tenth of a mile before Monument Geyser Basin, the trail tapers out and offers a new view to the south down a rocky trench toward a lower (and less wavy) section of the Gibbon River. Soon after, the forest parts and you will find yourself standing on bleached rocks with steam gushing out of the ground in front of you. You have arrived at Monument Geyser Basin.
See anyone else? There’s a good chance you will have to place to yourself, and the surprising privacy adds to the enjoyment as you explore this bewildering landscape.
Steam rises from scattered vents in the ground. The white billows fluctuate in intensity, and one could imagine a dragon’s lair within the mountainside. Clusters of dormant geyser cones are dispersed along the pale ground, and some chimneys are still churning out steam. Water bubbles up in shallow pools and flows down the mountainside. Parts of the basin are welcoming, while other parts are foreboding. Your safety is your responsibility. Avoid thin crusts, which you could fall though and get burned, and stay away from other fragile features that you could damage. By being a respectful visitor, you can safely explore Monument Geyser Basin and get up close to a lot of interesting features.
Monument Geyser Basin does not have mesmerizing colorful pools, but the destination stands out because it allows hikers to escape the crowds and have a more intimate interaction with a hydrothermal attraction. Return the way you came. It is downhill all the way! Yellowstone National Park has an entrance fee, but no permit is required to hike to Monument Geyser Basin. The nearby Artists’ Paintpots are another fun hydrothermal area to visit, with spitting mudpots and milky blue pools.
To get to the trailhead: Drive 4.7 miles southwest of Norris Canyon Road on Grand Loop Road (Route 89). Just after a bridge over the Gibbon River, turn right into a turnout for the trail to Monument Geyser Basin. Coming from the other direction, the trail is 8.6 miles northeast of Madison Junction.
Trailhead address: Grand Loop Road (Route 89), Yellowstone National Park, WY 82190
Trailhead coordinates: 44.683667, -110.744519 (44° 41′ 01.20″N 110° 44′ 40.26″W)
This 1.1-mile hike circles a hillside hydrothermal area, passing bursting mudpots, bubbling hot springs, and mesmerizing milky blue pools.
|Back Basin of Norris Geyser Basin
This loop passes Steamboat Spring, the world's largest geyser, and several other hydrothermal features.
|Porcelain Basin of Norris Geyser Basin
This pair of loops explores a stark basin with an impressive collection of geysers and hot springs.
|Fountain Paint Pot
This half-mile loop in Lower Geyser Basin passes geysers, hot springs, mudpots, and fumaroles - all of the hydrothermal features found in Yellowstone.
|Midway Geyser Basin
This 0.8 mile walkway passes Excelsior Geyser and Grand Prismatic Spring, the largest hot springs in Yellowstone.
|Biscuit Basin Loop
This 2/3 of a mile loop explores hydrothermal features in Upper Geyser Basin like Black Opal Pool, Sapphire Pool, and Black Pearl Geyser.
|Mammoth Hot Springs
This series of boardwalks explores a park highlight, a collection of colorful hot springs terraces.
This 1.25-mile round trip hike follows a riverbank to a natural hot tub where a stream of water cooked by nearby hydrothermal features mixes with the river.
This easy 0.8-mile round trip hike climbs 100 feet to a ghostly 100-foot cascade.
|More trails in Yellowstone
Explore other hikes to waterfalls and hydrothermal hot spots in Yellowstone National Park.
|Yellowstone National Park Campgrounds
Twelve developed campgrounds with over 2,000 total sites are spread throughout Yellowstone.