More than 9 miles of trails are available to hikers at Eldon Hazlet. The 3-mile Cherokee Trail has three separate loops that pass through a mature oak-hickory forest over gently rolling terrain, offering great views of the lake. The Pawnee Trail is a 1-mile loop trail running along the highest point on Carlyle Lake. Both the Cherokee and Pawnee trails lead to Burnside Cemetery, a restored cemetery with tombstones dating to the 1830s.
The Kaskaskian Trail is a 2 1/2-mile loop trail that begins at the park office and passes by the youth campground, the Pawnee Trail, various day-use areas and the Eagle trail, a 3/4-mile loop near the north end of Illini Campground. A 1/4 -mile accessible interpretive trail is located within the 3-acre prairie restoration directly across from the park office. The 1-mile Illini Trail is located across from the Campground Store and loops around the Illini Fishing Pond. All trails are closed Wednesday through Sunday during pheasant season.