Loyalsock Creek
Lycoming / Sullivan Co. · 64 mi · Class II–IV
59,200CFS/ 12.75 ft
Flood↓Falling fast (-400 cfs/hr)· -1,200 cfs in 3h
Optimal: 400–2000 CFS · USGS #01554000
Length
Difficulty
Optimal
Avg Flow
Hist. Median
USGS Gauge
Pennsylvania Natural Area (World's End State Park corridor)
Hidden gem of north-central Pennsylvania. The Loyalsock flows 64 miles through the Loyalsock State Forest in the ridge-and-valley Appalachians, with dramatic rapids and gorge scenery rarely seen in the East. Exceptional paddling late March through May.
Trip sections
Alpine Run to World's End — Class II–III, gorge scenery
World's End to Hillsgrove — Class III–IV, steepest whitewater
Lower Loyalsock to Montoursville — Class II, accessible
Outfitters
Loyalsock Adventures
Guided creek trips and shuttles
72-Hour Flow Forecast
NOAA NWPSLoading forecast...
10-Year Flow Patterns
See 10 years of flow patterns for this river — historical analysis is a Pro feature.Upgrade to Pro →
Your Optimal Range
Set your personal optimal CFS window per river — custom ranges are a Pro feature.Upgrade to Pro →
Data Quality
River conditions are community-verified. CFS ranges, difficulty ratings, and trip sections may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level. If you spot an error, use the Improve This River button at the top of the page — your local knowledge is what makes this atlas accurate.