Prince William Forest Park · VA
Green Loop
Live · updated
Today
Marginal conditions for trail running.
Today's best: trail running
Conditions
Score by activity
Hiking
Marginal conditions for hiking.
Trail running
Marginal conditions for trail running.
Score breakdown
- − 80°F air — Above trail running's comfort zone (28–78°F)
- ✓ Trail: prime — No meaningful rain in the last 48 hours. Trail surface is dry and tacky — prime traction.
- − 42 min of daylight — You need at least 93 min with margin. Bring a headlamp or start tomorrow.
Trail facts
- Distance
- 4.8 mi
- Elevation gain
- 487 ft
- Surface
- mixed
Trailhead
Coordinates
38.5422, -77.3772 — VA.
Park
Part of Prince William Forest Park (official site →).
Peak nymphal tick activity — check yourself within 2 hours of leaving the trail.
Nearby Trails
Frequently Asked
How long is Green Loop?
Green Loop is a 4.8-mile route with 487 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 Green Loop?
Green Loop is mixed surface — sections of dirt, rock, and root that vary along the route. Today's mud rating, derived from recent precipitation and the surface type, is shown in the conditions panel above.
Who manages Green Loop, and where do closure alerts come from?
Green Loop is in Prince William Forest 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.