Geo-Float Trail Ouachitas Region Get Directions Tell us why this business is your favorite! Physical Address: Ark. 227 Royal, AR 71968 Phone: 501-767-2108 Fax: 501-767-4952 GPS: N34.4869179 W93.2733354 On Lake/River (Lake Ouachita) Begins at the Spillway Recreation Area at Lake Ouachita. Boaters use a self-guided booklet describing the area geology as they follow a 16-mile marked route. Accessible Add to Trip Planner