Onondaga Cave State Park, Meramec River
River · Missouri
ℹ️ Community-reported spot. Details below are compiled from public sources and are reported to be accurate — always verify locally before visiting.
About this swimming hole
Onondaga Cave State Park pairs its famous cave tours with Meramec River swimming access in a deep Ozark valley. The cool, spring-fed river is a natural cooldown after the cave's constant 57 degrees. It is a classic two-for-one Missouri state park day.
Good to know
| Water type | River |
|---|---|
| Water temperature | 60s to 70s |
| Depth | river swimming |
| Best season | May-September |
| Fees | Free (cave tours extra) |
| Reservations required | No |
| Parking | state park lots |
| Amenities | river access, cave tours, campground, picnic areas |
| County | Crawford County |
| Nearest town | Leasburg |
| Safety notes | no lifeguard; river current |
Map
Nearby swimming holes
Frequently asked questions
Does Onondaga Cave State Park, Meramec River require reservations?
No reservations are required at Onondaga Cave State Park, Meramec River based on current information — but verify before you go.
Is there a fee to visit Onondaga Cave State Park, Meramec River?
Reported fee info: Free (cave tours extra). Fees can change — confirm with the official link.
When is the best time to visit Onondaga Cave State Park, Meramec River?
The best season is typically May-September.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026