John Bryan State Park
Rim trails, river paths, limestone and dolomite cliffs, camping, climbing, and an adjoining nature preserve follow the Little Miami through western Ohio’s most dramatic gorge.
Artwork inspired by Joseph O’Sickey
John Bryan protects the downstream continuation of Clifton Gorge, where the Little Miami cuts through resistant Silurian rock. Rim routes reveal cliff structure and forest canopy; lower paths put water, talus, and rock moisture at eye level. The park also supports designated climbing and rappelling, camping, picnicking, and access toward Yellow Springs, making it more varied than the neighboring preserve.
Pair the park with Clifton Gorge only if your group can manage the distance and elevation changes. Start from the park trail map, choose a rim or river emphasis, and treat wet limestone, roots, and cliff edges seriously. Climbers must use designated areas and understand current rules. Glen Helen is nearby but separately managed and should not be treated as another entrance to the same property.
- River
- Little Miami
- Geology
- Silurian limestone and dolomite
- Day use
- Free
Quick guide
- Read the rim first
- Cliff continuity and river bends become easier to understand from above.
- Descend selectively
- Lower trails add moisture, talus, and current but require the return climb.
How to compare a gorge from rim and river
- Read the rim first
- Cliff continuity and river bends become easier to understand from above.
- Descend selectively
- Lower trails add moisture, talus, and current but require the return climb.
- Separate neighbors
- Clifton Gorge, John Bryan, and Glen Helen have different rules.
- Climb only where designated
- Natural walls are protected and technical use is limited.
Good to know
Cliff-edge trails and wet rock require care, and most loops include grades or stairs. Clifton Gorge Nature Preserve and Glen Helen are adjacent destinations with separate parking and restrictions.
Notice these
- Little Miami gorge
- Rim and river trails
- Designated climbing area