Waterton Canyon
Rob Herrmann Photography

South Platte: Waterton Canyon (Lite Report)

Difficulty Intermediate
Ideal Days To Fish NA

Weekly Report

Report DateApril 29, 2021

Note: This report is a part of the FlyCast Lite reporting program and is updated seasonally or in the event of substantial changes that alter fly fishing tactics. FlyCast Lite reports are intended to give anglers a high level overview on seasonal conditions and general fishing tactics.

Like most other rivers, spring is a season of change in Waterton Canyon and while flows are still sitting at winter levels (38 cfs), we should see flows increase over the next two months as runoff picks up. Until that occurs, focusing on deep pools and runs is the way to go. Nymph rigs and dry dropper setups will produce the most consistent results but if you find yourself in a heavy midge or BWO hatch, don’t hesitate switching to a single or double dry fly setup. These trout are eager to feed this time of year and aren’t overly selective. When nymphing, lead with a larger attractor pattern such as a Copper John, Guide’s Choice Hare’s Ear, Pheasant Tail, Pat’s Rubber Legs or Electric Caddis. Below one of those patterns, trail a midge pupa, baetis emerger or Rainbow Warrior. All of the patterns mentioned above are productive nymphs for a dry dropper setup. Elk Hair Caddis, Amy’s Ants and Hippy Stompers are buoyant dry flies that are capable of trailing 1-2 nymphs and even some split shot. As we progress through the spring and flows rise, trout will spread out across the river and feed in pools, runs, pocket water, riffles and transitions. At this point, bright and flashy patterns will become highly productive and water clarity tends to decrease. Additionally, be on the lookout for increased caddis and stonefly activity as air and water temperatures rise.

Recommended Flies

River Flow

Flow Region

Detailed River Info

Background

The Waterton Canyon stretch of the South Platte is a fun and convenient option for anglers living in the Denver Metro Area. The South Platte River merges with the North Fork of the South Platte above Strontia Springs Reservoir. Below Strontia Springs Reservoir is the Waterton Canyon stretch of the South Platte. This section of river flows 6.5 miles northeast from the reservoir through Waterton Canyon before spilling into Chatfield Reservoir. Waterton Canyon is unique in that it’s only accessible by foot or bike. As a result, Waterton Canyon receives far less angling pressure than the other sections of the South Platte, but it does experience heavy hiking and biking traffic, so keep that in mind while casting. Waterton Canyon is technically fishable year around but due to high canyon walls, the banks and shaded sections tend to freeze during the winter. Anglers will find a healthy population of rainbow and brown trout in the 6 – 12 inch range. With that said, don’t be surprised if you come across a large brown or rainbow that has migrated from Chatfield Reservoir.

Angling

Waterton Canyon is a fantastic stretch for anglers of all skill levels. The lower part of the canyon contains slow runs and deeper pools that are ideal for new anglers working on their presentation skills. Higher in the canyon, you’ll find faster pocket water that will test the skills of more experienced anglers. With the exception of a few deep pools and runs, the river is relatively shallow, making a dry dropper setup our preferred strategy most of the year. Fishing a dry dropper will attract trout feeding on the surface and those feeding sub-surface on nymphs. Hopper and caddis patterns are productive dry fly options for a dry dropper setup. Waterton Canyon experiences a number of hatches throughout the year (midge, baetis, caddis and stonefly) so don’t be surprised if you see trout aggressively feeding on the surface during a hatch. Unless you’re matching the hatch and casting to rising trout, fly selection isn’t overly complicated in this river. Standard searcher patterns (Pheasant Tails, Guide’s Choice Hare’s Ears, Copper Johns, Prince Nymphs etc.), San Juan Worms and midge patterns are consistent year around. During the warm months, caddis, stonefly and baetis patterns are highly productive.

River Access

With a primary parking lot and one trail into the canyon, access to Waterton Canyon is straightforward. From the parking lot, anglers can either walk or bike up the canyon on a 6.5-mile-long, dirt road (cars are prohibited). If you have the ability, we highly recommend biking as it will allow you to cover more ground. If biking isn’t an option, don’t worry, there is plenty of good water in the bottom half of the canyon. Keep in mind, dogs aren’t allowed in the canyon, so you’ll need to leave your furry fishing buddy at home.