The Lake Eufaula State Park Trail System boasts five trails for hiking and mountain biking. Each of the trails ranges in distance from a quarter mile to 2.5 miles and is recommended for beginner to intermediate hikers. Located near the Deep Fork Campground, the Crazy Snake Interpretive Trail is the only trail in the system that is ADA compliant. At a quarter mile long, this fully paved nature trail provides both shady secluded areas and open meadows dotted with wildflowers in the spring. Educational signs about the local plant and animal life are placed at a comfortable height for visitors in wheelchairs.

The 2.5 mile Chinkapin Hiking Trail, which is used by hikers and mountain bikers, begins at the park's visitor center and runs south to the picnic area by Longhorn Loop. Twists and turns through a dense forest area make this beginner to intermediate trail a fun trek. The Chinkapin Trail also has a small informative side trail, the Savannah Loop Trail, that hikers can visit to read informational signs about the area. The Savannah Loop Trail is three quarters of a mile long and offers a mix of open grassland and shaded areas.

Another interpretive trail is located on the northwest side of Lake Eufaula State Park across from the Dogwood Drive Area. The three quarter mile Arrow Maker Trail winds through the forest and back to the park road. Visitors can navigate this easy to walk trail with an educational brochure.

The last of the trails in the Lake Eufaula State Park Trail System is the Hummingbird Beach Trail, which is used by hikers and mountain bikers. At just over two miles, this hiking trail begins at the nature center and runs southeast to take visitors to the beach area where there is a handicap accessible comfort station and rest area, The trail then joins up with the Crazy Snake Trail for the rest of the way.