Chesapeake & Ohio Canal National Historical Park · MD
Knobley Tunnel Trail
Live · updated
Today
Park closure — trail is inaccessible today.
Today's best: hiking
Multiple items are closed due to hazardous conditions or maintenance. See below for more details.
Conditions
Score by activity
Hiking
Park closure — trail is inaccessible today.
Trail running
Park closure — trail is inaccessible today.
Mountain biking
Park closure — trail is inaccessible today.
Dog walking
Park closure — trail is inaccessible today.
Score breakdown
- · 80°F air — Within comfort range, outside ideal
- ✓ Trail: prime — No meaningful rain in the last 48 hours. Trail surface is dry and tacky — prime traction.
Trail facts
- Distance
- 0.1 mi
- Elevation gain
- 14 ft
- Surface
- gravel
Trailhead
Coordinates
39.6281, -78.7750 — MD.
Park
Part of Chesapeake & Ohio Canal National Historical Park (official site →).
Park advisories
DC Water is managing a sanitary sewer overflow from the Potomac Interceptor near Lock 10. Anyone with questions or in need of support can reach out to DC Water’s 24-Hour Command Center at (202) 612-3400 or visit https://www.dcwater.com/about-dc-water/media/potomac-interceptor-collapse.
More from Chesapeake & Ohio Canal National Historical Park →
Horses are prohibited between Little Tonoloway (mile 124.5) and Paw Paw (mile 155) due to recent and ongoing towpath resurfacing. See more for details.
More from Chesapeake & Ohio Canal National Historical Park →
Visitors are restricted to the designated trails within the Gold Mine Tract in the Great Falls area. This location is generally defined as that area bordered by MacArthur Boulevard and Berma Road and depicted on the Great Falls Maryland Hiking Map.
More from Chesapeake & Ohio Canal National Historical Park →
Peak nymphal tick activity — check yourself within 2 hours of leaving the trail.
Nearby Trails
Frequently Asked
How long is Knobley Tunnel Trail?
Knobley Tunnel Trail is a 0.1-mile route with 14 feet of elevation gain. The trail facts panel on this page lists distance, surface, and access tags as they appear in OpenStreetMap.
What's the trail surface like at Knobley Tunnel Trail?
Knobley Tunnel Trail is crushed gravel or compacted aggregate — drains quickly, stays passable in wet weather. Today's mud rating, derived from recent precipitation and the surface type, is shown in the conditions panel above.
Who manages Knobley Tunnel Trail, and where do closure alerts come from?
Knobley Tunnel Trail is in Chesapeake & Ohio Canal National Historical Park, which is managed by the National Park Service. Closure and advisory data on this page comes from the live NPS alerts API for this park unit. Always confirm against the park's own page before driving — emergency closures can post faster than scrapers refresh.