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Live flow and temperature data straight from USGS and Colorado DWR gauges. No guesswork.
CFS and water temp from USGS and Colorado DWR gauges, updated live.
General hatch windows for Colorado tailwaters. Conditions vary year to year — always check our daily report for what's actually on the water.
| Insect | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Midges (Chironomidae) | ✓ | ✓ | ✓ | ✓ | ★ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Blue Winged Olive (BWO) | ✓ | ✓ | ✓ | ✓ | ★ | — | — | — | ✓ | ✓ | ✓ | ✓ |
| PMD (Pale Morning Dun) | — | — | — | — | ★ | ✓ | ✓ | ✓ | — | — | — | — |
| Caddis (Trichoptera) | — | — | — | ✓ | ★ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — |
| Golden Stonefly | — | — | — | — | ★ | ✓ | ✓ | — | — | — | — | — |
| Terrestrials (Ants / Hoppers) | — | — | — | — | — | — | ✓ | ✓ | ✓ | — | — | — |