Mesa Falls

State: Idaho. Type: pair of waterfalls (Upper and Lower Mesa Falls) on the Henrys Fork of the Snake River in the Caribou-Targhee National Forest, Fremont County, eastern Idaho, near Ashton. Upper Mesa Falls drops about 114 feet and is roughly 200 feet wide; Lower Mesa Falls drops about 65 feet. Often cited as the last major waterfalls on the Snake River system unaltered by dams or diversions for irrigation or hydropower. The historic Big Falls Inn (built around 1915) serves as the Mesa Falls Visitor Center. Jointly managed by the U.S. Forest Service and Idaho Department of Parks and Recreation.

Mesa Falls is a pair of powerful waterfalls on the Henrys Fork of the Snake River in the Caribou-Targhee National Forest of eastern Idaho, a short drive from Ashton along the Mesa Falls Scenic Byway. The larger and more visited of the two, Upper Mesa Falls, thunders about 114 feet over a rhyolite cliff and stretches roughly 200 feet wide, sending up mist that visitors can feel from a series of viewing platforms and boardwalks reached from the historic Big Falls Inn. About a mile downstream, Lower Mesa Falls drops another 65 feet and is best seen from the Grandview Overlook. The falls are geologically notable: they pour over the Mesa Falls Tuff, a thick layer of volcanic rock deposited some 1.3 million years ago by eruptions from the Henrys Fork caldera, part of the same volcanic system that feeds Yellowstone. They are also frequently described as the last significant waterfalls on the Snake River unaffected by human dams and diversions, which lends them special conservation value. The setting, thick forest just outside Yellowstone National Park, makes the falls a popular stop for road-trippers, photographers and families, accessible in summer and reachable only by snowmobile or ski in winter.

Mesa Falls lies on the Henrys Fork of the Snake River in the Caribou-Targhee National Forest, in Fremont County, eastern Idaho, at an elevation of roughly 5,600 feet. The falls are northeast of the town of Ashton and are reached via the Mesa Falls Scenic Byway (Idaho State Highway 47 and Forest Service Route 294), which runs between Ashton and U.S. Highway 20 near the Island Park area. Upper Mesa Falls, with the Big Falls Inn visitor center, is the main developed site; Lower Mesa Falls lies about a mile downstream and is viewed from the Grandview Overlook.

Mesa Falls sits at about 5,600 feet in the mountains of eastern Idaho near Yellowstone, giving it cool, short summers and long, cold, snowy winters. Summer days are pleasant and generally warm, but mornings and evenings are cool at this elevation. Snow arrives early and lingers late, and the access road (Forest Service Route 294) is closed to automobiles in winter, when the byway becomes a groomed snowmobile route. Spring runoff swells the Henrys Fork and makes the falls especially powerful.

Late spring through early fall is the best time to visit, when the access roads and the Big Falls Inn visitor center are open and the boardwalks and overlooks are accessible by car. Late spring and early summer bring the heaviest flow from snowmelt, making the falls most dramatic. Summer offers the most reliable weather and full visitor services, while fall adds color and smaller crowds. In winter the falls can still be reached, but only by snowmobile or skis, since the road is closed to cars.

The Mesa Falls area has a layered history. Geologically, the falls tumble over the Mesa Falls Tuff, a layer of volcanic rock laid down about 1.3 million years ago during rhyolitic eruptions from the Henrys Fork caldera; later basalt flows partly filled the canyon before the river carved the inner gorge visible today. In the early 20th century, the site drew commercial interest: the Big Falls Inn was built around 1915 by the Snake River Electric Light and Power Company, which had considered harnessing the falls for power, and the inn later served travelers before falling into disuse. Restored and now listed on the National Register of Historic Places, it serves as the Mesa Falls Visitor Center. Unlike almost every other major drop on the Snake River, Upper and Lower Mesa Falls were never dammed or diverted for irrigation or hydroelectric use, leaving them as the last prominent free-flowing waterfalls on the river system, a fact central to their preservation.

The main activities are viewing and photographing the two falls. At Upper Mesa Falls, an accessible trail, boardwalks and multiple viewing platforms lead right up to the base of the roaring cascade, where visitors feel the spray. The historic Big Falls Inn visitor center offers exhibits and information. A short drive downstream, the Grandview Overlook provides a view of Lower Mesa Falls. Beyond the falls, the surrounding Caribou-Targhee National Forest and the Mesa Falls Scenic Byway offer scenic driving, wildlife-watching, hiking, fishing on the renowned Henrys Fork, and picnicking. In winter the byway becomes a snowmobiling and skiing route to reach the falls.

The two headline sights are Upper Mesa Falls, with its boardwalk network and viewing platforms and the historic Big Falls Inn visitor center, and Lower Mesa Falls, viewed from the Grandview Overlook about a mile downstream. The Mesa Falls Scenic Byway itself is an attraction, winding through the forest between Ashton and the Island Park area. The Henrys Fork of the Snake River, famous among fly anglers, runs through the area, and the broader Caribou-Targhee National Forest offers additional trails and overlooks.

From Ashton, take the Mesa Falls Scenic Byway (Idaho State Highway 47) northeast; the Upper Mesa Falls site is a short drive off the byway. The falls can also be reached from the north via U.S. Highway 20 near Island Park and Forest Service Route 294. Idaho Falls Regional Airport (IDA) is the nearest commercial airport, roughly an hour and a half to two hours' drive southwest, where visitors rent cars. A personal or rental vehicle is essential, as there is no public transit; in winter the Route 294 access is closed to cars and the falls are reached only by snowmobile or ski.

The falls area is a day-use site; as of research the Big Falls Inn visitor center at Upper Mesa Falls was open daily during summer, with reported hours of about 9:30 a.m. to 5:30 p.m., and limited or no services in the off-season. The developed site is accessible by car during the snow-free months; in winter the access road (Forest Service Route 294) is closed to automobiles and open as a snowmobile route. Confirm current visitor-center hours and seasonal road status with the Caribou-Targhee National Forest before visiting.

As of research, a fee of $5 per vehicle per day was charged to park and access the Upper Mesa Falls area, payable in cash on arrival; holders of the federal America the Beautiful (Interagency) pass are admitted without the additional charge. Reporting indicated the fee also covered admission to nearby Harriman State Park. Confirm current fees and accepted payment methods with the Caribou-Targhee National Forest or Idaho Parks and Recreation before you go.

Allow about one to two hours to walk the boardwalks and viewing platforms at Upper Mesa Falls, visit the Big Falls Inn, and drive to the Lower Mesa Falls (Grandview) Overlook. Combining the falls with a longer drive along the Mesa Falls Scenic Byway or fishing on the Henrys Fork can fill a half or full day.

There is no lodging at the falls themselves. The nearest town, Ashton, offers a limited selection of motels and rentals, and the Island Park area to the north has resorts, cabins and campgrounds popular with anglers and Yellowstone-bound travelers. The Caribou-Targhee National Forest has campgrounds in the vicinity. For a wider range of hotels, visitors often stay in Rexburg or Idaho Falls to the south, or in the Island Park/West Yellowstone corridor.

There are no full restaurants at the falls, so visitors typically eat in Ashton, which has a handful of casual eateries and stores, or in the Island Park area, which has restaurants and lodges catering to tourists and anglers. Many visitors pack a picnic to enjoy near the falls or along the byway. For a broader dining selection, Rexburg and Idaho Falls to the south are the nearest larger towns.

Harriman State Park, known for its wildlife and the blue-ribbon Henrys Fork fishery, lies nearby to the north. The Island Park area, including Big Springs and Henrys Lake, offers additional recreation, and Yellowstone National Park's western entrance is within driving distance to the northeast. The town of Ashton and the wider Yellowstone-Teton region provide further attractions, and the Mesa Falls Scenic Byway links many of these sights.

Idaho Falls Regional Airport (IDA) is the nearest commercial airport, roughly 1.5 to 2 hours' drive southwest. The area is reached by Idaho State Highway 47 and U.S. Highway 20. There is no public transit to the falls, so a personal or rental vehicle is required; in winter, snowmobiles or skis are needed to reach the falls because the access road is closed to cars.

Stay on the designated boardwalks, trails and viewing platforms, as the rocks near the falls are wet, slick and bordered by steep drops into the gorge, and supervise children closely. Spray can make surfaces slippery, so wear shoes with good grip. At about 5,600 feet elevation, weather can change quickly and evenings are cool, so bring layers. In winter, only experienced, well-equipped snowmobilers or skiers should attempt the closed road. This is bear country, so follow forest guidance. Dial 911 for emergencies.

Bring a light jacket or layers for the cool, high-elevation air and mist near the falls, sturdy non-slip shoes for the boardwalks, sunscreen and water, and cash for the per-vehicle day-use fee. A camera or phone is a must for the falls, and binoculars are useful for wildlife along the byway. In winter, full snow gear and appropriate snowmobile or ski equipment are essential.

Visit in late spring or early summer for the most powerful flow, and plan around the summer season when the road and Big Falls Inn visitor center are open. Bring cash for the $5-per-vehicle fee, since it is collected on-site. Combine the falls with a drive along the full Mesa Falls Scenic Byway and a stop at nearby Harriman State Park, which the same fee reportedly covers. Confirm seasonal road status before going, since the winter closure of Route 294 changes access entirely.

For any emergency, dial 911. The falls lie within the Caribou-Targhee National Forest in Fremont County; contact the Caribou-Targhee National Forest (Ashton-Island Park Ranger District) for non-emergency questions about conditions, and reach local emergency services through 911. A visitor-center phone number was not verified during research.

Mesa Falls Visitor Center, Caribou-Targhee National Forest (U.S. Forest Service) - https://www.fs.usda.gov/r04/caribou-targhee/recreation/mesa-falls-visitor-center

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.