| Three Island Crossing State Park | |
| Idaho State Park | |
| Country | United States |
|---|---|
| State | Idaho |
| County | Elmore |
| Location | Glenns Ferry |
| - elevation | 2,484 ft (757 m) |
| - coordinates | 42°56′28″N 115°19′06″W / 42.941098°N 115.318395°WCoordinates: 42°56′28″N 115°19′06″W / 42.941098°N 115.318395°W |
| Area | 613 acres (248 ha) |
| Founded | 1968 |
| Management | Idaho Department of Parks and Recreation |
| IUCN category | V - Protected Landscape/Seascape |
| Website: Three Island Crossing State Park | |
Three Island Crossing State Park is a state park of Idaho, United States, interpreting the site of a ford of the Snake River on the Oregon Trail. The park is located in Glenns Ferry in Elmore County. The site was used as a crossing until 1869 when Gus Glenn built a ferry across the river about 2 miles (3.2 km) upstream. There is a campground with serviced campsites and cabins along with a free interpretive visitor's center at the park.