Parking
Use the Thornton River trail access on Skyline Drive near milepost 25.4. The Hull School junction is not a verified vehicle pickup, so plan to return to this access.
Overview
About Upper Thornton River Trail
Why go
- A former fire-road corridor gives the descent a direct line through the hollow.
Heads up
- The steep descent becomes a long climb on the return.
Map & elevation
The route
Loading the Shenandoah map
Full mapElevation1,342–2,605 ft
Plan your hike
Before you go
Parking
Safety
2 active Shenandoah alerts
- ClosureOld Rag Trailhead main lot closedThe Old Rag Trailhead main parking lot is closed to vehicles and pedestrians for infrastructure improvements; use the existing overflow lots. - Work is expected to be completed by November 2026.Official details
- ClosureBackcountry camping and zone closuresBackcountry camping is prohibited on the Appalachian Trail from Lewis Mountain to Big Meadows, and the Naked Creek backcountry zone is closed.Official details
The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Shenandoah Tour Guide
Your drive to Upper Thornton River Trail, narrated.
Parkwolf is a GPS audio tour guide for Shenandoah 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.
See the Shenandoah audio tourRecorded for this area
Antlers Built Again Each Year0:00 / 0:29
“If you spot a white-tailed buck in summer, his antlers may look soft and furry. That covering is called velvet, and blood vessels nourish the growing antlers beneath it.”
Plays on the road 0.5 mi from the trailhead in the Parkwolf Shenandoah Tour Guide.
More stories near here in the app
- Jeremys Run Overlook: The Gap Between Two Mountains
- Thornton Hollow Overlook: The Eastward View
- Elkwallow: Burgers and a Picnic Break
- Piney River: A CCC Office and a Longer Walk
- 146 audio storiesacross Shenandoah’s roads, triggered by GPS as you drive
- Wildlife heatmapsfor Black Bear, Bald Eagle, White-tailed Deer, and 13 more
- Works offlinemaps, 163 trails, 142 places, and audio download before you lose signal
- CarPlay readysimple controls built for the drive
“Fantastic app with many points of information… It’s great to just turn on while you’re driving and it gives you an audio tour of the national Park. We love it!!!!”
Trail guide
Hiking Upper Thornton River Trail
Route and effortPlan on a 6.26-mile out-and-back from Skyline Drive at milepost 25.4. The 3.
Plan on a 6.26-mile out-and-back from Skyline Drive at milepost 25.4. The 3.13-mile descent to Hull School junction drops about 1,300 feet; budget roughly five hours for the return climb on the same trail.
Where the Upper route endsThe Upper segment ends at its junction with Hull School Trail.
The Upper segment ends at its junction with Hull School Trail. The continuation toward the park boundary follows Thornton River Lower Trail. No separate vehicle pickup at the junction was verified, so plan to retrace the route to Skyline Drive.
Former fire roadThe route follows the old Thornton Hollow fire road, steepest near the Skyline Drive end before…
The route follows the old Thornton Hollow fire road, steepest near the Skyline Drive end before it eases lower down. Pets are allowed here; keep them on a physical leash no longer than six feet.
Wildlife
Wildlife in Shenandoah
325 sightingsBlack BearMost seen around 6 AMSighting map
21 sightingsBald EagleMost seen around 10 AMSighting map
1,036 sightingsWhite-tailed DeerMost seen around 7 PMSighting map
167 sightingsWild TurkeyMost seen around 7 AMSighting map
93 sightingsTimber RattlesnakeMost seen around 6 PMSighting map
24 sightingsCoyoteMost seen around 6 AMSighting mapSighting maps show where each species has been reported across Shenandoah. Wildlife moves, so no sighting is guaranteed.
