Big Wood River At Stanton Crossing near Bellevue
Big Wood River · Rockies · USGS gage 13140800
Trout (marginal) (summer mean 17.2°C — trout, warm in summer).
Water
58°F
Flow
28 cfs
Air
79°F
Sky
0%
Pressure
29.64 in
Wind
16 mph
Predicted hatches · 2026-08-03
PredictedSpotted / Summer CaddisHydropsyche spp.1.00
Predicted by conditions; no reports yet. water 14.7°C (58°F) sits in the prime band (14-19°C); peak season; low pressure — fish looking up; watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedPale Morning DunEphemerella spp.0.55
Predicted by conditions; no reports yet. water 14.7°C (58°F) sits in the prime band (13-18°C); shoulder of the season; low pressure — fish looking up; watch late morning to early afternoon.
flies: PMD Comparadun #16-18, Sparkle Dun, Pheasant Tail #16
PredictedHopper / TerrestrialsAcrididae (grasshoppers)0.34
water 14.7°C (58°F) is warming toward the prime band (17-24°C); peak season; warm sun favors it; low pressure — fish looking up; wind puts terrestrials in play; watch warm, breezy afternoons.
flies: Morrish Hopper #8-12, Chubby Chernobyl, Dave's Hopper
PredictedSlate Drake / IsonychiaIsonychia spp.0.19
water 14.7°C (58°F) is warming toward the prime band (16-21°C); shoulder of the season; low pressure — fish looking up; watch afternoon/evening; nymphs crawl to shore to emerge.
flies: Isonychia #10-12, Slate Drake, Leadwing Coachman
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.