Raymer Hollow Trail in Mammoth Cave National Park

Mammoth Cave National Park, KY

Raymer Hollow Trail

A hilly forest connector joining two backcountry trails.

Length
6.2mi
Time
2.5hr
Elev. change
257ft
Difficulty
Moderate
  • Dogs allowed
  • High point 841 ft

Hear the audio tour

Good Spring Baptist Church and Cemetery

Overview

About Raymer Hollow Trail

Why go

  • A long, wooded traverse with a stream-crossing section.
  • Links Mill Branch and Collie Ridge and passes a signed campsite spur.

Heads up

  • No direct road access; approach and exit miles add substantially.
  • Several hills and a ravine crossing that may be wet.

Map & elevation

The route

Loading the Mammoth Cave map
Full map
Elevation584–841 ft
TrailheadMill Branch Trail / Raymer Hollow Trail junction37.21467, -86.14938
Keep this map with you offline in the Parkwolf app

Plan your hike

Before you go

Parking

There is no parking at the Mill Branch or Collie Ridge junctions. Reach the connector on foot through the backcountry network, such as from Maple Springs Trailhead via Mill Branch or from Lincoln Trailhead via Collie Ridge. Add the approach and exit miles; the 6.2 miles is one way.

Safety

Dry Prong can cover the stepping stones, and backcountry streams are not reliable drinking sources; carry enough water and treat any collected water. Expect horse traffic. Keep dogs on a leash up to six feet and move aside calmly for riders.

4 active Mammoth Cave alerts

  • ClosureGreen River Ferry suspendedGreen River Ferry service is suspended because low water levels prevent operation. - Service will resume once water levels rise and conditions are safe; a river forecast is available.Official details
  • ClosureAccessible Tour unavailableThe Accessible Tour is unavailable because mechanical issues have taken the cave elevator out of service. - Check back for updates or call the visitor center at (270) 758-2180.Official details
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A park ranger sits on a dash-mounted phone, talking, as Parkwolf’s Tour Guide plays “Army Cutworm Moths: A Grizzly Bear Buffet” on Grand Loop Road below Dunraven Pass in Yellowstone
Parkwolf Tour GuideThe highest, rockiest slopes around here are a summer buffet for grizzly bears.

Mammoth Cave Tour Guide

Your drive to Raymer Hollow Trail, narrated.

Parkwolf is a GPS audio tour guide for Mammoth Cave National Park. As you drive, it chimes in with what’s ahead: hidden gems, upcoming stops, history, geology, and wildlife, right through your car’s speakers.

Recorded for this area

Good Spring Baptist Church and Cemetery
0:00 / 0:29
“Good Spring Baptist Church and Cemetery is coming up, a short history stop near Maple Springs. Give it a few minutes to look beyond the little white church.”

Plays on the road 0.4 mi from the trailhead in the Parkwolf Mammoth Cave Tour Guide.

More stories near here in the app

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  • 52 audio storiesacross Mammoth Cave’s roads, triggered by GPS as you drive
  • Wildlife heatmapsfor White-tailed Deer, Tricolored Bat, Cave Salamander, and 13 more
  • Works offlinemaps, 47 trails, 42 places, and audio download before you lose signal
  • CarPlay readysimple controls built for the drive
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Trail guide

Hiking Raymer Hollow Trail

A connector, not a loopRaymer Hollow Trail is a 6.

Raymer Hollow Trail is a 6.2-mile one-way backcountry connector between Mill Branch Trail and Collie Ridge Trail. It is not a 6.2-mile out-and-back, and neither end is a road-side trailhead. Allow about 2.5 hours for the corridor itself and add the miles needed to reach it and leave it through the surrounding trail network. A published 10.6-mile circuit from Big Hollow Trailhead combines Raymer Hollow with part of Collie Ridge; that longer itinerary includes other trail miles.

Hills and Dry ProngFrom Mill Branch, the route rises on broad dirt tread, then narrows into a forest path.

From Mill Branch, the route rises on broad dirt tread, then narrows into a forest path. Several moderate hills break up the 6.2 miles. At roughly 4.2 miles, the trail drops into a ravine to cross Dry Prong. Stepping stones have been used there, but water can cover them, so be ready for wet feet when the creek is up. Two more climbs follow, then a longer level stretch leads toward the northern end.

A short campsite spurAbout 4.75 miles from Mill Branch, a marked 0.

About 4.75 miles from Mill Branch, a marked 0.1-mile spur leads to Raymer Hollow Backcountry Campsite, about 1.5 miles before Collie Ridge. The spur is separate from the 6.2-mile trail length; an overnight stay requires a backcountry permit or reservation. The final 0.4 mile climbs toward Collie Ridge.

Plan the access as carefully as the hikeThere is no direct car access at either end.

There is no direct car access at either end. Reach the Mill Branch junction from the broader backcountry network, such as Maple Springs Trailhead via Mill Branch, or approach the Collie Ridge end from Lincoln Trailhead; account for those extra miles and arrange a loop or point-to-point plan. Dogs are allowed on surface trails on a leash up to six feet. Horses also use backcountry trails, so step aside and keep dogs calm while they pass.

Wildlife

Wildlife in Mammoth Cave

All Mammoth Cave wildlife maps

Sighting maps show where each species has been reported across Mammoth Cave. Wildlife moves, so no sighting is guaranteed.

Keep exploring

Near Raymer Hollow Trail

See it all on the map

Trails that start nearby

Places near the trailhead

Parkwolf’s Mammoth Cave ranking

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