Natural swimming hole
Onondaga Cave State Park, Meramec River
River · Missouri
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
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Frequently asked questions
Can you swim in Onondaga Cave State Park, Meramec River?
Yes — Onondaga Cave State Park, Meramec River is listed as a natural swimming spot in Missouri. Reported water temperature: 60s to 70s. Heads-up: no lifeguard; river current. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
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.