D. Boon Hut Trail #209

Area Status: Open
This area is Open

D. Boon Hut Trail #209 Map

D. Boon Hut Trail #209 leaves the Grays Arch Picnic Area along Tunnel Ridge Road. The trail descends into a deep gorge under towering cliffs. Below the cliffs are cove hardwoods with a thick rhododendron understory and other native flora.

The trail leads to a large fenced rock shelter that was once mined for saltpeter. The miners built crude wooden troughs and filled them with sandstone. They poured water through the sand to leach out potassium nitrate, an ingredient used to make gunpowder in the 1800s.

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This trail is located in the Red River Gorge on Cumberland Ranger District of the Daniel Boone National Forest.

D. Boon Hut Trail #209 Trail Guide and Map (pdf)

Red River Gorge Brochure (pdf)

Trailhead: Grays Arch Picnic Area

Trail Connections: Rough Trail #221 (along Martin's Fork)

Red River Gorge 36x36 Map36x36 inch map (pdf; 7 MB) of the Red River Gorge. Includes trails, roads, streams, recreation areas, Clifty Wilderness and other boundaries. You can get this map printed full size by contacting a print vendor with a large format plotter. In some versions of Acrobat, you can print out sections on your home printer. Better yet, download the file for a digital reference.

At a Glance

Fees None
Permit Info: You must purchase a permit if camping in the Red River Gorge (outside Koomer Ridge Campground) between 10 p.m. and 6 a.m.
Open Season: Open all year
Restrictions: This trail is developed for hiking only. 
Closest Towns: Slade
Operated By: U.S. Forest Service
Information Center:
Gladie Visitor Center
3451 Sky Bridge Road
Stanton, KY 40380
859-488-1413 (2020 season)

General Information


This trail does not meet accessibility standards for persons with disabilities. 


Traveling east on the Mountain Parkway, take exit 33 at Slade. Turn left and then right onto KY 15; travel east 3.2 miles to Tunnel Ridge Road on the left. Follow Tunnel Ridge Road 0.7 miles to the Grays Arch Picnic Area on the right.


Parking is available at the Grays Arch Picnic Area.



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Day Hiking