This trail to the base of the bridge is on the right/west, but it's worth it to continue on the overlook trail a few feet for a good view before heading down. The rest of the trail is a mix of packed dirt, natural rock, and stairs carved from the rock. This makes it fairly easy to follow and not too strenuous (although you're dropping about 175 feet). The views of Owachomo Bridge from beneath are fascinating!
Bring plenty of water, as you'll have to go back up.