Flood Group
Flood Group flows at 203 degrees Fahrenheit in Yellowstone's Midway Geyser Basin, positioned just 583 feet from the Grand Loop Road and heating water 166 degrees above the 37-degree average air temperature at this location.
The thermal complex emerges at 7,235 feet elevation in Gallatin County between the famous Excelsior Geyser Crater and Grand Prismatic Spring. The Midway Geyser Basin features some of Yellowstone's largest thermal features, with massive hot spring discharge feeding the Firehole River through brilliantly colored runoff channels. Extensive geyserite terraces and thermophilic bacterial mats create orange, yellow, and green bands across the landscape. Winter's 152 inches of snow combine with 29 inches of annual precipitation to maintain the Firehole River's substantial flow.
The name likely references historic flooding events or high-volume discharge from this thermal group, though specific documentation is limited. The Midway Geyser Basin gained scientific attention during the 1871 Hayden Survey and has remained a focal point for thermal research. The National Park Service manages the area with permanent natural protection, maintaining boardwalks that allow safe viewing while preventing resource damage from foot traffic.
Access from the Grand Loop Road's Midway Geyser Basin parking area via maintained boardwalks, typically open May through October. Early morning visits avoid peak crowds at adjacent Grand Prismatic Spring. The short walk is wheelchair accessible via boardwalks. Steam can obscure views on cold mornings or when winds are calm. Winter access requires snowcoach or snowmobile permits.
Is Flood Group worth visiting?
Best for
- Viewing dramatic geothermal features
- Overnight camping trips
- Winter soaking with dramatic temperature contrast
Not ideal for
- Swimming or soaking
Overview Big Springs Group Area is located 22 miles south of West Yellowstone, Montana in beautiful Island Park, Idaho at an approximate elevation of 6,300 feet. Visitors love Island Park for its world-class fishing and outstanding scenery and wildlife viewing opportunities.Recreation Big Springs is the headwaters of Henry's Fork and is one of the largest springs in the country. Henry's Fork is considered one of the best fly-fishing streams in the nation. Fishermen cast for rainbow and brook...