Low clear flows set up a fall fishing window on the Colorado River

What's next

Expect stable, clear water to continue while flows stay low. Per Field & Stream, fall fly fishing rewards adaptability: on low, clear water, leaders of 12 feet or longer tapered to 6X or 7X tippet with small parachutes or Compara-duns match the blue-winged olive hatches that dominate autumn. If the weather turns gray or wet, shift to nymphs or larger orange caddis patterns.

Crystal Fly Shop (CO) also notes that tiny and shiny flies have been productive on neighboring rivers, so a small flashy nymph is a sensible dropper under a dry. A waxing crescent moon means little night light, so the best windows are mid-morning through early afternoon when the water is warmest and insects are most active.

Smallmouth Bass and other warmwater fish slow as temperatures drop, so spend your time on the cooler, well-oxygenated stretches. Check state regulations and any voluntary closures before heading out.

Context

Mid-October is typically the shift from summer patterns to fall patterns on Colorado's Western Slope. Cooling water pushes fish toward slower, deeper runs and tailouts, and blue-winged olives and midges take over the hatch schedule. This year's drought has kept many rivers lower and clearer than usual for the season, which makes stealth and fine tippets more important than they would be in a normal autumn.