Description - American Falls Reservoir is formed by American Falls Dam, which is a major facility on the Mindoka Project. Managed by the Bureau of Reclamation, Snake River Area Office, Bingham County; and the city of American Falls, this 87 square mile (56,000-acre) reservoir offers 100 miles of shoreline. Built primarily as a water storge reservoir for irrigation, it also provides electric power and flood control protection. When completely full, the reservoir is the largest reservoir on the Snake River and in Idaho.
- Available species include rainbow and cutthroat trout, yellow perch, bluegill, and coho salmon. Season open year-round, however the fishery is dependent upon the availability of water to maintain the minimum pool necessary to carry over fish from year to year.
Recreation - Boating, canoeing, fishing, swimming, wildlife viewing, picnicking, jet boats, water skiing, wildlife viewing, and windsurfing are the major recreation activities at American Falls Reservoir. The site offers restrooms, three boat ramps at the southwest end of the reservoir and one north of the dam, campground, picnic tables, swimming, and a visitor center. The visitor center features displays about various aspects of Shoshone and Bannock Indian prehistoric, historic, and contemporary culture. Other displays exhibit memorabilia associated with the construction of Ameircan Falls dam.
Climate - The climate in Idaho varies with the elevation. The bottom of Hell's Canyon, Boise and other locations at low elevations receive hot summer weather. Temperatures at these elevations often reach 90 degrees or more during the summer months. At the same time the mountains will get mild temperatures with cool nights.
Winters are just as extreme with the mountains experiencing extreme conditions and temperatures. An average of 500 inches of snow falls on the Idaho highlands. Temperatures are known to dip below zero degrees F on many winter nights. The lower elevations enjoy a more mild winter season with less precipitation than the mountains. The sun is a constant throughout the year. Be sure to wear sunscreen and layered clothing in Idaho's unpredictable weather.
located north of the town of American Falls, with good access via Interstate 86 and State Route 39. State Route 39 rides the top of the reservoir's 9-story-high dam for over half a mile.