Northeast
South Branch Raritan River (Ken Lockwood Gorge)
Live Conditions
South Branch Raritan River (Ken Lockwood Gorge) — At High Bridge, NJ (gauge unverified)
Live Conditions
South Branch Raritan River (Ken Lockwood Gorge) — At Stanton, NJ (gauge unverified)
7-Day Flow
↓ Falling
24-Hr Pressure
29.55 inHg · → High/stable
Voluntary Catch-and-Release Advisory
Water temperature is at or above 68°F. At these temperatures trout are physiologically stressed and have a higher post-release mortality rate. Consider waiting for cooler conditions — early morning or evening — or choosing a tailwater with regulated temperatures.
Local Weather
Tough conditions — fish deep
Today
☁️Overcast
81° / 65°
Tomorrow
🌦️Drizzle
82° / 63°
Sun
☁️Overcast
84° / 60°
Mon
🌦️Drizzle
74° / 61°
0.07"
Cold front incoming — go deep with nymphs, surface activity likely slow.
Weather by Open-Meteo · No API key · Updated every 30 min
What should I fish today?
One call. Specific to today's exact conditions on the South Branch Raritan River (Ken Lockwood Gorge).
2
Time of Day
What should I pack?
Rod, flies, tippet, and safety gear specific to today's South Branch Raritan River (Ken Lockwood Gorge) conditions.
🪰 Hatch Calendar
South Branch Raritan River (Ken Lockwood Gorge) · June · Early Summer
🟡 Approaching — within 5°F of trigger range
Select month
Sulphurs (size 16-18). Light Cahill. Caddis evenings. Best month in the gorge.
🟢 Active · 🟡 Approaching · ⚪ Seasonal only
River Map
About South Branch Raritan River (Ken Lockwood Gorge)
The crown jewel of New Jersey fly fishing — the Ken Lockwood Gorge section in Hunterdon County offers a dramatic, roadless canyon of freestone water holding wild and stocked brown and rainbow trout. Designated fly-fishing only with catch-and-release through much of the gorge, it fishes best at low-to-moderate flows with dry flies and nymphs. It draws serious anglers from across the Mid-Atlantic for its combination of wild fish, scenery, and quality regulations.
Regulations
Fly-fishing only in the Ken Lockwood Gorge (approx. 2.5 miles). Catch-and-release only for trout within the gorge. Standard NJ trout season applies outside the gorge. Check current NJDEP regulations for special season dates and size/creel limits. NOTE: USGS gauges 01396500 and 01397000 are unverified — flow data may be stale or unavailable; check with local outfitters as backup.