River Styx Spring Trail
River Styx Spring
A short surface trail from the visitor center to the spring where the cave's underground river emerges at the foot of the hill and flows into the Green River.
The underground river of Mammoth Cave eventually surfaces at the foot of the hill, and River Styx Spring is where the cave's 'River Styx' emerges. Clear spring water forms a jade-green pool among the trees before flowing into the Green River. The trail starts from the visitor center or near the Historic Entrance and descends past the Green River overlook. The round trip takes about 1.5 hours, and it can be combined with the Historic Entrance and Echo River Spring into a loop. The trail is free but fairly steep and slippery after rain, making it a good option for a stroll if you don't want to go underground or are waiting for a cave tour.
Opening hours
Sunrise to sunset
Nearby sights
- Historic Tour (Historic Entrance)
- Green River (Ferry & Canoeing)
- Grand Avenue Tour (Carmichael Entrance)
- Great Onyx Cave
- Cedar Sink Trail
- Frozen Niagara / Domes & Dripstones
- Diamond Caverns
- Dinosaur World