Arkansas River:          Upper Section

Weekly Overview:

February 24, 2020: 

  • Technicality: 3/5

  • The Upper Ark has been very consistent and productive this winter. Flows have been steady and healthy. Currently sitting at 450 cfs, flows are roughly 200 cfs above the historical average. With a combination of elevated flows and cold water temps, trout are stacked up in the slow water. The slack water between the outer seam and bank as well as the slow pools/runs should consume most of your time. One thing you shouldn’t underestimate right now is the amount of splitshot needed to get your flies down quickly. Unless you’re snagging the bottom of the river every few casts, you probably need to add more weight. We’ve seen some decent hatch activity and a few risers, but for the most part, feeding remains sub-surface. Searcher patterns and flashy attractors are great lead flies. Below that, keep it simple with a midge larva and pupa pattern. If you’re not seeing any action, swap out your flies for tiny and shiny patterns. This usually does the trick.

  • Ideal Days to Fish: Thursday, Friday & Saturday

  • Suggested Flies:

    • Sub-surface: Pats Rubber Legs (#10-12), RS2 (#20-22), Chocolate Thunder (#22-24), Stalcup's Baetis (#20-22), JuJu Baetis (#20-22), WD 40 (#20-22) Prince Nymph (#16-18), Mercury Pheasant Tail (#18-20), Hare's Ear (#16-18), red Copper John (#18-20), Black Beauty (#22-24), Zebra Midge (#20-22), Top Secret Midge (#22-24), Disco Midge (#22-24), Mercury Midge (#22-24), Rainbow Warrior (#18-20), Mayer's Mini-Leech and San Juan Worm.

    • Surface: Parachute Adams (#22 - #24), Griffiths Gnat (#24)

      • Need flies for your trip? FlyCast has collaborated with our friends at Anglers All ​to package a dozen flies that are hot on the Arkansas River right now - Click here for hand selected flies

Upper Ark.png
Credit: Colorado Division of Water Resources

Detailed River Info:


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.  


River Access:

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.  

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