Seneca Creek State Park · MD
Alt Line
Live · updated
Today
Marginal conditions for mountain biking.
Today's best: mountain biking
Conditions
Score by activity
Hiking
Marginal conditions for hiking.
Trail running
Marginal conditions for trail running.
Mountain biking
Marginal conditions for mountain biking.
Dog walking
Marginal conditions for dog walking.
Score breakdown
- · 79°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.
- − NWS alert active — Check the alert before heading out
Trail facts
- Distance
- 0.11 mi
- Elevation gain
- 47 ft
- Surface
- dirt
Trailhead
Coordinates
39.1281, -77.2594 — MD.
Park
Part of Seneca Creek State Park (official site →).
Peak nymphal tick activity — check yourself within 2 hours of leaving the trail.
Nearby Trails
Frequently Asked
How long is Alt Line?
Alt Line is a 0.11-mile route with 47 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 Alt Line?
Alt Line is natural dirt singletrack — soft underfoot, holds water, slow to dry after rain. Today's mud rating, derived from recent precipitation and the surface type, is shown in the conditions panel above.
Who manages Alt Line, and where do closure alerts come from?
Alt Line is in Seneca Creek State Park, which is managed by the Maryland Department of Natural Resources. Closure and advisory data on this page comes from public MD DNR park-alert pages (best-effort scrape). Always confirm against the park's own page before driving — emergency closures can post faster than scrapers refresh.