Black Rock Mill Accesson Catoctin Creek
Conditions right now
No USGS gauge is linked to this water yet, so we can't chart flows.
Blue-Winged Olive hatches are expected to be consistent
- 01Blue-Winged Olive hatches are expected to be consistent, especially on overcast afternoons.
- 02Subsurface nymphing with midge and mayfly patterns will be highly effective throughout the day.
- 03Streamer fishing with leech and baitfish imitations should produce aggressive strikes from larger trout.
- 04Egg patterns will become increasingly important as some trout begin their spawning rituals.
- 05Look for October Caddis activity, especially in the late afternoons.
What to tie on at Black Rock Mill Access
Picked from recent reports for this stretch.
San Juan Worm
Effective year-round, especially after spring rainfall or runoff, when aquatic worms are washed into the system, making them an easy meal for trout.
Buy at AmazonFlashback Baetis Nymph
Aligns with active early spring mayfly nymph activity during consistent BWO hatches, making it an effective subsurface offering.
Murray's Caddis Pupa
Caddis pupae are actively emerging in spring, making this a crucial subsurface pattern for trout keying on ascending insects.
Zebra Midge
Midges are a primary active insect even in cold water, making this a staple year-round pattern that is highly effective for enticing finicky trout in spring.
Buy at AmazonElk Hair Caddis
Caddis activity increases significantly in late spring, making this a reliable dry fly for imitating adult caddis.
Buy at AmazonPheasant Tail Nymph
Mimics various small mayfly nymphs that are active year-round and particularly as Blue-Winged Olives begin to emerge in spring.
Buy at AmazonWoolly Bugger (Black/Olive)
An essential streamer for enticing aggressive strikes from trout, imitating leeches and baitfish active in colder spring water.
Blue-Winged Olive Comparadun
Blue-Winged Olives are actively hatching in early spring, especially on overcast days, and this low-profile dry fly is excellent for selective trout feeding on emergers and adults.
Elk Hair Caddis
Caddisflies are actively hatching throughout the summer, making this a staple dry fly for rising trout.
Buy at AmazonMaryland season by season
What changes on the water through the year, with the flies for each season.
Fly shops nearby
Local flies, current advice and guided trips.