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© 2026 Roaming.Camp · Data from NPS, Recreation.gov, BLM, USFS, NWS, and the FCC.Operating on ceded ancestral land.Photography via Unsplash.

Leave it better than you found it.

Hike

Green Ash Trail

Summits High Knob

2.2 mi loop · 593 ft climb · 1,573 ft high point

MD · OpenStreetMap contributors

About Elevation Highlights Map Camp near here More hikes

About this hike

Loop covering 2.2 miles with 593 feet of climb to Frederick Overlook, North Frederick Viewpoint, and High Knob in Gambrill State Park.

Elevation

593 ft of gain and 593 ft of descent.

Camp near here

The closest places to sleep, measured from the trailhead.

See all on the map

11.8 mi from the trailhead
Bald Eagle Island Hiker-Biker Campsite
Campground · MD

More hikes nearby

Ranked the same way, within twenty-five miles.

14 mi from you
Northern Peaks Trail
- Summits Sugarloaf Mountain
- 1,222 ft of climbing
- Camp 4 mi away
5.3 mi loop · 1,222 ft climb
MD · Camp 4 mi away

Elevation along the trail from the start. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

High KnobDestination · 0.4 mi in
Middletown OverlookDestination · 0.4 mi in
Frederick OverlookDestination · 0.4 mi in
North Frederick ViewpointDestination · 0.9 mi in

Nearby reading

Gambrill State Park

Map

The route at the trailhead. Drag with two fingers, or hold a key to zoom.

Trail data: USFS, NPS, © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP via Mapzen terrain tiles. Nearby reading: Wikipedia. Download the trail and feature data.

At a glance

Length: 2.2 mi
Shape: Loop
Gain: 593 ft
Descent: 593 ft
High point: 1,573 ft
Low point: 1,032 ft
Managed by: OpenStreetMap contributors
State: MD
Camps within 15 mi: 18
Trailhead: 39.4621° N · 77.4912° W

Get directions Open the map

11.8 mi from the trailhead

Bald Eagle Island Hiker-Biker Campsite

Campground · MD

12.5 mi from the trailhead

Camp Round Meadow

Campground · MD

17 mi from you

Appalachian Trail

Passes Loudoun Heights
2,533 ft of climbing
Camp 2 mi away

6.5 mi of trails · 2,533 ft climb · Hard

Harpers Ferry National Historical Park · Camp 2 mi away

TR-9 Hog Rock Trail

Ends at Cunningham Falls
Inside Catoctin Mountain Park
Camp under a mile away

1.4 mi one way · 491 ft climb · Easy

Catoctin Mountain Park · Camp under a mile away

TR-3 Cunningham Falls Trail

Ends at Cunningham Falls
Inside Catoctin Mountain Park
Camp under a mile away

1.2 mi one way · 357 ft climb · Easy

Catoctin Mountain Park · Camp under a mile away

TR-1 Chimney Rock/Wolf Rock Trail

Summits Wolf Rock
Inside Catoctin Mountain Park
1,337 ft of climbing

3.8 mi of trails · 1,337 ft climb · Easy

Catoctin Mountain Park · Camp under a mile away

Hog Rock Loop Trail

Ends at Cunningham Falls
1,048 ft of climbing
Camp under a mile away

4.5 mi loop · 1,048 ft climb

MD · Camp under a mile away

Signal

Cell coverage here

VerizonLTE · Fair
AT&TLTE · Fair
T-Mobile5G · Good

FCC coverage data · signal varies in remote terrain

Weather

7-day forecast

Today85°69°Scattered Rain Showers
Fri80°61°Mostly Sunny
Sat76°65°Partly Sunny
Sun80°63°Showers And Thunderstorms
Mon70°61°Chance Rain Showers
Tue66°57°Chance Rain Showers
Wed67°58°Chance Rain Showers

Today: Scattered Rain Showers then Scattered Showers And Thunderstorms · wind 6 mph SW

National Weather Service · refreshed hourly

More like this

Hikes that read like this one, wherever they are.

Red Maple Trail
- Summits High Knob
1.0 mi loop · 183 ft climb
MD · Camp 12 mi away
Black Locust Trail
- Summits High Knob
2.9 mi loop · 716 ft climb
MD · Camp 12 mi away
White Oak Trail
- Ends at Frederick Overlook
1.0 mi loop · 194 ft climb
MD · Camp 12 mi away
Yellow Poplar Trail
- Ends at North Frederick Viewpoint
- 1,205 ft of climbing
7.4 mi of trails · 1,205 ft climb
MD · Camp 12 mi away