State Highway 151 (abbreviated SH-151 or OK-151) runs 2.30 miles (3.70 km) across Keystone Dam in northeastern Oklahoma.

State Highway 151 begins at a trumpet interchange with SH-51 east of Mannford.

[4] SH-151, running north-northeast, then serves as the eastern boundary of Keystone State Park.

After crossing the dam, the route ends at US-64/US-412 at another trumpet interchange, west of Sand Springs.

The highway would remain unlabeled on the official state maps until the 2008 edition.