Shoshone Falls Enters Peak Flow Season Through May 18, Visitors Encouraged to Visit
Southern Idaho’s iconic Shoshone Falls is entering its most spectacular stretch of the spring season, with water flows set to surge dramatically over the coming days and remain elevated through May 18 before tapering off again.
As of Tuesday, roughly 400 cubic feet per second (cfs) was passing over the falls. That figure is expected to climb to approximately 3,700 cfs by Thursday afternoon — nearly ten times the current volume — making this week an ideal time for Magic Valley residents and visitors to make the short drive to the Twin Falls landmark.
Federal Water Releases Drive the Surge
The boost in flow is tied to an annual federal process. The U.S. Bureau of Reclamation releases water each spring from reservoirs on the Upper Snake River to assist juvenile salmon and steelhead in their downstream migration through the lower Snake and Columbia rivers toward the Pacific Ocean. That additional water is being passed through Milner Dam, located east of Twin Falls, with the volume expected to ramp up over several days until it reaches the target rate.
Idaho Power, which operates the Shoshone Falls Power Plant, does not control the timing or volume of those federal releases. The company does, however, commit to providing a minimum scenic flow of 300 cfs over the falls during summer months, provided sufficient water arrives from upstream.
The power plant itself has a generating capacity of 14,729 kilowatts — enough electricity to supply more than 11,000 homes. Built in 1907, it was the first power plant constructed in the Magic Valley and remains a piece of regional infrastructure history.
More Than a Waterfall
Standing 212 feet tall, Shoshone Falls is higher than Niagara Falls, earning its longstanding nickname as the “Niagara of the West.” The park surrounding the falls offers something for nearly every visitor: children’s playgrounds, picnic areas, hiking trails, a boat ramp, a swimming area, and a scenic overlook with sweeping views of the Snake River Canyon.
Park admission runs $5 per vehicle from now through September — a modest entry fee for one of southern Idaho’s most recognized natural attractions.
With peak flows expected to hold through May 18, the next two weeks represent the best opportunity of the season to see the falls at full force. The Magic Valley community has shown a strong spirit of rallying around its outdoor and recreational assets this year, and Shoshone Falls remains the flagship attraction drawing visitors from across the region and beyond.
What Comes Next
Flows over the falls are scheduled to decrease after May 18 as the federal water release program winds down. Visitors hoping to catch the falls at their most powerful are encouraged to plan a visit before that date. Idaho Power will continue maintaining its minimum scenic flow commitment through the summer months, keeping the falls visually active even as spring runoff subsides. For the latest flow information, Idaho Power periodically updates conditions through official channels.