Mystic Falls Trail

Overview

This is a crowd-pleasing Yellowstone walk that packs in a lot: Biscuit Basin’s neon thermal features, a shady river path, and a 70‑foot cascade on the Little Firehole River. It’s popular, yet often less hectic than nearby marquee stops. Wildflowers can linger into August and early fall colors show up in September.

Route Options

• Out-and-back to the falls: roughly 2.2–2.4 miles round trip with about 150–250 feet of gain. Easy, quick, and perfect if you just want the waterfall.
• Loop via the Biscuit Basin Overlook: about 3.4–3.6 miles round trip with ~500–636 feet of gain. Expect short, steep switchbacks above the falls and big views over Biscuit Basin and the Upper Geyser Basin. Time it right and you can watch Old Faithful from the overlook. Plan 1.5–2 hours, more if you linger.
• Longer variations: Confident hikers can link the Upper Geyser Basin and Biscuit Basin for ~8 miles. There’s also a strenuous backcountry extension toward Precipitous Falls (~10 miles) for experienced parties only.

Getting There

Park at the Biscuit Basin lot, cross the Firehole River, and walk the boardwalks; the Mystic Falls Trail begins on the west side of the basin loop. There are no restrooms or potable water at the trailhead—use the facilities at the Old Faithful Visitor Center beforehand.

What You’ll See

You’ll stroll past Biscuit Basin’s stars (including the sapphire-blue pool that gave the basin its name) before ducking into forest along the Little Firehole River. The river narrows near the falls, where the water drops off the Madison Plateau. On the loop, the climb above the falls opens to wide panoramas over the geyser basins.

Trail Notes

Footing is generally easy to the falls; the loop adds a short, steep, and sometimes narrow climb with noticeable drop-offs—take your time. Boardwalks and ground near thermal features can be fragile and dangerously hot; stay on designated routes. Mosquitoes can be pesky in June–July; bring repellent. In winter, this route becomes a pretty snowshoe/ski outing for those with navigation awareness.

Best Time to Hike

The typical season runs May through October, with the most reliable conditions and lighter-feeling crowds in August–September. Aim for early morning or late afternoon for easier parking and softer light. Early fall right after Labor Day is a sweet spot for cooler temps, better parking, and more wildlife activity.

Wildlife and Safety

This is bear country—carry bear spray, make noise, and hike in a group when possible. Give wildlife space (at least 100 yards from bears and wolves, 25 yards from other animals). Keep food secured and never leave packs unattended. Pets are not allowed on park trails or boardwalks. Hydrothermal activity can prompt temporary closures, so be ready with a backup plan.