Green Mountain Reservoir Confluenceon Blue River (below Dillon Reservoir)
River flow last 30 days
Blue River flowing at a very low 18
- 01Blue River flowing at a very low 18.9 cfs, making fish spooky and concentrated.
- 02Consistent midge activity and prime Blue-Winged Olive (BWO) hatches expected.
- 03Top nymphing patterns: Midge (20-24), Flashback Hare's Ear Nymph (16-18), Mysis Shrimp (Nymph) (16-18), and Blood Dot Egg (14-16).
- 04Blue-Winged Olive Comparadun (20-22) for rising fish during BWO hatches.
- 05Focus on deeper pools, slower runs, and areas with cover like undercut banks and large rocks.
- 06Stealth, long leaders (9-12 ft), and light tippets (5x-6x) are crucial for success in clear, low water.
What to tie on at Green Mountain Reservoir Confluence
Picked from recent reports for this stretch.
Parachute BWO
An excellent imitation for actively emerging Blue-Winged Olives, particularly when fish are looking up.
Zebra Midge
Midges are a primary and consistent food source in tailwaters year-round, especially effective in current low flows.
Buy at AmazonSan Juan Worm
Annelids are a predominant food source in the Blue River tailwater, effective year-round.
Buy at AmazonBlue-Winged Olive Comparadun
Matches the small Baetis (Blue Winged Olives) hatching on overcast afternoons.
Mysis Shrimp
A predominant food source in the Blue River tailwater, effective year-round.
Buy at AmazonSparkle Dun
Effective for targeting trout feeding on vulnerable Blue-Winged Olive emergers in the surface film.
Pheasant Tail Nymph
A versatile imitation for various small mayfly nymphs, a consistent food source in tailwaters during summer.
Buy at AmazonHare's Ear Nymph
A staple general mayfly nymph that works year-round and is effective in tailwaters.
Buy at AmazonElk Hair Caddis
Caddis are active in summer, and this is a reliable adult imitation for opportunistic feeders.
Buy at AmazonColorado 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.