Warm weather in the Upper Arkansas River Valley encouraged snow melt and runoff, leading to a gradual increase in flow. Flows reached 422 cfs on Monday but have since dropped back down below 300 cfs due to the cold front that moved in a couple days ago. Because of this, water clarity will gradually improve until flows increase again. Caddis hatches were quiet the past few days but we should see them pick up again with warmer weather in the forecast. BWOs are still making a regular appearance during the early afternoon. If you see mild temps and overcast skies, be prepared for a heavy hatch and epic dry fly fishing. While targeting trout on the surface is our preferred tactic at the moment, nymphing remains highly productive. Lead with a stonefly larva, caddis larva or flashy attractor. Behind one of those patterns, trail a caddis pupa or baetis emerger. Sparkle Pupas, RS2s, Darth Baetis and Barr’s Emergers are some of our favorites. It’s a great time to cover a lot of water, so don’t get sucked into fishing the same deep pool/run all day. If you’ve been excited to fish the stretch through Leadville, right now is a great time to get after it. BWOs are active and trout are taking full advantage.
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The upper section of the Arkansas River is a freestone river sourced from snowmelt in the Sawatch and Mosquito mountain ranges near Leadville, Colorado. The upper section is arguably the most wade friendly section of the river with many access points running from Leadville through Salida. This fishery has been a major focus for improvement over the past decade as fish populations were historically impacted by the heavy mining activity that occurred in Leadville. Luckily, due to the efforts of trout activist groups, the fishery continues to improve year over year and has become a fun and productive stretch to fish. Brown and rainbow trout are the primary residents with brown trout making up 75% of the trout population. Average trout sizes range from 12” – 16” with a max of 20”. Regulations dictate that only artificial flies and lures may be used. Depending on the section of the river, bag limits vary from 1 – 4 trout over 12” with the exception of rainbow trout. All rainbow trout must be released.
The upper section of the Arkansas River is best fished from late spring through fall. Low flows and ice make this stretch difficult to fish during the winter months. The river yields long runs and riffles as it winds through open meadows from Leadville to Twin Lakes Reservoir. From Twin Lakes to Salida, the river goes through mountainous terrain providing deep pools, runs and pockets. Anglers can count on experiencing the standard Colorado hatches with midges hatching throughout the year, Mayflies in the late spring through fall, and caddis and stoneflies in the summer. River flows are typically lower the closer you are to Leadville and increase the further south you go towards Buena Vista. Knowing this, fishing a dry dropper rig is the go-to method when fishing near Leadville and a mixture of dry dropper and nymphing rigs are the effective setups when fishing near Buena Vista.
Long stretches of public water and a number of designated fishing pull-offs provide for easy fishing access. One of the best ways to explore this river is to drive south on highway 24 from Leadville and test out the various fishing pull-offs along the way. Some of the more notable sections are Hayden Meadows in Leadville, Granite Rock in Granite, Elephant Rock in Buena Vista and Fisherman’s Bridge south of Buena Vista.