Devil’s Icebox Trail
A compact boardwalk loop crossing a natural rock bridge to cold cave air, sinkholes, a spring, and an underground stream.
Artwork inspired by Frederick Oakes Sylvester
This roughly half-mile interpretive trail provides the clearest first look at Rock Bridge Memorial State Park. It crosses the natural tunnel, loops by Devil’s Icebox sinkhole and spring, and reveals how surface water and collapsed cave passages shape karst terrain.
It is short but not a polished indoor attraction: boards and rock can be slick, stairs and grades matter, and flooding can close access. Devil’s Icebox Cave itself is protected; obey gates and current signs rather than following old trip reports.
- Length
- About 0.5 mile
- Type
- Boardwalk loop
- Best feature
- Rock Bridge + cave air
Quick guide
- Core comparison
- Boardwalk ↔ Natural rock bridge
- Second-look plan
- Double sinkhole
Devil’s Icebox Trail: bridge and air
- Bridge
- Notice the stream passing through collapsed cave roof.
- Air
- Temperature change reveals underground airflow.
- Spring
- Watch where water reappears.
- Wildlife
- Never bypass bat-protection gates.
Good to know
The “icebox” sensation is natural air conditioning: dense cool cave air settles near the opening even when central Missouri is hot.
Notice these
- Boardwalk
- Natural rock bridge
- Double sinkhole
- Cold cave stream