Grassy Lake

About Grassy Lake

Grassy Lake which is formed by Grassy Lake Dam is a major feature on the Mindoka Project. This 1,477-acre reservoir is located near the Wyoming-Idaho border between Yellowstone and Grand Teton National Parks. Fish species include rainbow, cutthroat, and lake trout. Reservoir acre feet and total reservoir capacity and cubic feet/second release rates for rivers below Upper Snake River Basin reservoirs and select river locations are updated daily and graphically provided. No improvements, services, or facilities.

How to Get There

Fair access via Forest Service Road 135, east of U.S. 89/287.

Plan Your Visit to Grassy Lake

Heading to Grassy Lake? A few things to know before you go:

• Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
• Fees: day-use and camping fees vary; check current rates on the official park page
• Trash & pack-out: follow Leave No Trace principles
• Wildlife: store food in bear boxes where provided; never feed wildlife
• Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

References & Official Resources

• Official Recreation.gov page
• View on OpenStreetMap
• Driving directions (Google Maps)