Midway Geyser Basin Boardwalk

Overview

This is the classic up-close tour of Yellowstone’s most dazzling hot springs. The Midway Geyser Basin Boardwalk is a roughly 0.7–0.8 mile total loop with minimal elevation change, almost entirely on wooden and paved boardwalk. It’s short, easy, and very popular—expect to share it.

What You’ll See

Grand Prismatic Spring is the star: the park’s largest hot spring, over 120 feet deep and hundreds of feet across, ringed in surreal blues, greens, yellows, and oranges created by heat-loving microbes. Excelsior Geyser Crater is a massive, constantly steaming pool that pours thousands of gallons per minute into the Firehole River—watch the outflow from the bridge. Don’t rush past Turquoise and Opal Pools near the end; they’re smaller and often underrated, with beautiful color and detail.

Route and Accessibility

Plan 15–45 minutes depending on crowds and photo stops. The surface is a wide boardwalk with gentle grades and ramps. Accessible parking, restrooms, and the boardwalk are available, though a few slightly steeper spots and crowd bottlenecks can make movement with mobility devices easier with assistance. Some sections may lack railings—keep a close eye on kids.

Crowds and Timing

Parking is limited and often congested, especially late morning through afternoon. Early or late visits help, but cool mornings can be steamier, sometimes obscuring the colors. As the day warms and the sun hits the water, the colors typically pop—just expect a tougher parking situation.

Best Time to Hike

On a sunny, less-windy day, late morning to mid‑afternoon offers clearer views of the spring’s colors. If you want fewer people, go early or toward evening and be ready for more steam. For the postcard overhead angle, pair this boardwalk with the Grand Prismatic Overlook via the Fairy Falls trailhead; do the overlook for the aerial rainbow, then come here to feel the heat and see the details.

Safety and Etiquette

Stay on the boardwalk—hydrothermal ground is thin and water can cause severe burns. Don’t touch or step on the colorful microbial mats. Surfaces can be slick when wet, and steam can reduce visibility. Supervise children and be patient at narrow sections.

Logistics

There are restrooms at the Midway parking area along the Firehole River. Expect traffic control and possible waits in peak season. Follow posted signs if roadside parking is permitted. Official park maps are more reliable for planning in this area; GPS apps can be inaccurate within the park.