Union Falls Trail

The Union Falls Trail is considered a moderate to difficult hike. Its substantial length, typically 15 to 17 miles round trip, combined with over 1,000 feet of ascent and descent, including sections like "Cardiac Hill" and a steep, sandy final mile, contribute to its difficulty. The numerous river fords, especially the swift and cold crossing of the Falls River, are also a significant challenge.

The best time to hike the Union Falls Trail is generally from mid-July through early fall. This is primarily because the river crossings, particularly the Falls River, can be tricky, swift, cold, and potentially knee-deep, and are often not recommended before mid-July due to high water levels. Fall offers the added beauty of huckleberry bushes turning vibrant red.

The trail traverses diverse terrain, including lush temperate forests, deep woods, and wetland areas. You'll encounter climbs and descents, including a notable section nicknamed "Cardiac Hill." The last mile to Union Falls can be sandy and steep. A defining characteristic is the necessity of multiple river fords, including Cascade Creek and the Falls River.

The primary highlight is the majestic Union Falls itself, Yellowstone's second tallest named waterfall, where two creeks converge before plunging 250-260 feet. Other notable features include the Mountain Ash Creek Trail, Terraced Falls, and the unique thermally heated Scout Pool (also known as Ouzel Pool), which offers a chance for a warm swim.

Yes, the Union Falls Trail is located within Yellowstone National Park, so standard park entrance fees apply. Additionally, if you plan on backcountry camping along the trail, you will need to obtain a backcountry permit. You can find more information on fees and permits on the official NPS website: nps.gov.

No, dogs are generally not allowed on hiking trails in Yellowstone National Park, including the Union Falls Trail. Pets are restricted to developed areas, frontcountry campgrounds, and within 100 feet of roads. This policy is in place to protect wildlife and ensure visitor safety.

The Union Falls Trail is typically accessed from the Bechler region in the southwest corner of Yellowstone National Park. Specific trailhead parking is available in this remote area, but it's advisable to check the latest park information for precise directions and any seasonal access restrictions, as the area is quite isolated.

Yes, the route follows sections of the Mountain Ash Creek trail for a significant portion. It also briefly intersects with the Pitchstone Plateau Trail, the 9U4, 9C4, and 9c5 Campsite Spur Trail, and a small part of the South Boundary Trail: Grassy Lake-South Entrance.

Given its length, remote location, and river crossings, you should be prepared for a full day in the backcountry. Essential items include plenty of water, high-energy snacks, sturdy waterproof hiking boots, extra layers of clothing (even in summer), rain gear, a first-aid kit, navigation tools (map and compass or GPS), and bear spray. Consider bringing water shoes or sandals for river fords.

Yes, the Union Falls Trail offers a quintessential Yellowstone backcountry experience, and there are designated backcountry campsites along the route. If you plan to camp, you must obtain a backcountry permit from Yellowstone National Park in advance. This allows for a deeper immersion into the park's wilderness.

This trail stands out for its remote backcountry setting in Yellowstone's "Cascade Corner," offering solitude away from more crowded park attractions. The unique convergence of two creeks at Union Falls creates a visually stunning waterfall. The multiple river fords provide a genuine wilderness challenge, and the opportunity to soak in the naturally heated Scout Pool offers a memorable and unique respite.