From Tulsa:

Take Hwy. 412/64 West and follow until you see the signs that say "Keystone State Park." Once in the park, follow the signs to Pier 51 Marina.

From West I-35:

Take Hwy. 412/64 East to the sign that says "Keystone State Park/Keystone Dam. After you exit, follow the signs to the Park and then to Pier 51 Marina.

From Oklahoma City:

Take I-44 East towards Tulsa and exit at the Bristow exit. Take Hwy 66 East to Hwy 48 North. Take Hwy. 48 North to Hwy. 51 east. Travel Hwy. 51 East to Hwy. 151 North. Follow Hwy. 151 North until you see the Keystone State Park sign on your left. Turn into the park and follow the signs to Pier 51 Marina.