Allegheny Islands State Park

Quick Facts

Allegheny Islands State Park


(724) 865-2131

Map Directions

Things To Do



Allegheny Islands State Park is in Allegheny County in Harmar Township, just southwest of the borough of Cheswick. Established in 1980, the park is composed of three alluvial islands in the middle of the Allegheny River northeast of Pittsburgh. The islands have a total area of 43 acres, with one island upstream of Lock and Dam No. 3, and the other two downstream. Twelve Mile Island is the furthest downstream and has a number of houses and buildings on the western four-fifths of the island. Fourteen Mile Island is given to the middle island, just downstream of the dam, and it is the site of the highway and railroad bridges. This unnamed island is the easternmost and the only one upstream of the dam. There are also five to seven shoals near the islands, which are occasionally exposed. Allegheny Islands is accessable by boat only. Group camping is permitted on the islands with written permission from the Department. The park is undeveloped so there are no facilities available for the public. At this time there are no plans for future development.

Map of Allegheny Islands (PA)

Latitude, Longitude: 40.534155, -79.835243



  • Boating

    Kayaking and canoeing are popular activties surrounding Allegheny Islands State Park.

  • Camping

    Group camping (such as with Scout Groups or church groups) is permitted on the islands with written permission from the Department.



Allegheny Islands is in the Allegheny River above and below Lock and Dam 3, Allegheny County, Pennsylvania.

Phone Numbers


(724) 865-2131