Fly Fishing Stream Conditions Report: Green River - B Section - Devil's Hole

Period:

Mar 2026Feb 2026Jan 2026Sep 2025Jul 2025Jun 2025May 2025Apr 2025Aug 2024Dec 2023Nov 2023Oct 2023

Report Summary for Mar 2026

This year: Flows on the Green River B Section have been stable, holding around 850 CFS, with water temperatures averaging 41°F. Fishing quality has been consistently good. On the upper B section, a Midge hatch typically begins around 10 am in the mornings, followed by Blue Wing Olives appearing around noon, with their numbers increasing daily. For these hatches, small dry flies like a Midge Adult Dry or Griffiths Gnat on 5-6x tippet can be very productive on calm days. Additionally, don't overlook dry-dropper rigs using terrestrials such as ants, beetles, crickets, or cicadas, fished with 4x tippet. Beyond the surface action, nymph rigs and streamers remain highly effective throughout the B Section. For nymphing, patterns like a PGH Quill Midge or Bling Midge on 5x or 6x tippet are recommended. On the lower B, committing to streamers with 0X tippet and a slow retrieval has been a particularly successful method.

Best time of day: Morning

Prior years: Flow is high at 1200 cfs. Nymph rigs and streamers are the most effective methods on the B Section. Anglers should commit to streamers on lower B. Chironomids (Midges) are present.

This report combines publicly available data when available with our own analysis to give a comprehensive view of the stream conditions.

Callibaetis Cripple fly pattern

Callibaetis Cripple

Size: 18
emerger
PGH Quill Midge fly pattern

PGH Quill Midge

Size: 18-20
nymph
Midge Adult Dry fly pattern

Midge Adult Dry

Size: 22
dry
Bling Midge fly pattern

Bling Midge

Size: 20-22
nymph
Griffiths Gnat fly pattern

Griffiths Gnat

Size: 20
dry

Monthly water conditions

GREEN RIVER NEAR GREENDALE, UT

This month

841 CFS

Avg 41°F (40–42°F)

Last month

847 CFS

Avg 40°F (40–41°F)

Rate this report

Your feedback helps us improve stream reports.

Looks good

Needs attention

Free report limit
You have a limit of 3 free report views. Subscribe for unlimited reports and full access to all features.

Get more insights about what is hatching year round.