Streamer Fishing Horsetooth Reservoir for Trophy Trout

Horsetooth Reservoir doesn't look like a trout fishery. It looks like a place where people water ski and drink beer on pontoon boats. And sure, that happens. But early in the morning, before the recreational boaters show up, the rocky western shoreline holds some absolutely giant brown trout that most anglers have no idea exist.

Best Time to Go

Late April through June, and again in September and October. Early mornings—first light until about 8am—are the most productive. Browns cruise the shallows during these low-light periods and ambush baitfish along the rocky points and drop-offs.

Float Tube Strategy

A float tube or kayak is by far the best way to access the productive water at Horsetooth. You can get to rocky points and coves that shore anglers can't reach, and you can present streamers at the right angle without spooking fish in the clear water.

Position yourself just off the rocky points and cast parallel to the shoreline, letting the fly swing near the rocks before stripping it back with varying speeds. A slow pull-pause retrieve often works best in cold water (early spring and fall); faster, more aggressive strips can trigger reaction strikes in warmer water.

Fly Selection

Start with a size #6 black Woolly Bugger with a bead head. If you're not getting strikes in 30 minutes, switch colors—olive, white, or rust patterns can make a big difference on different days. A Clouser Minnow in chartreuse/white is excellent when rainbows are active in mid-water.

In summer, damselfly nymphs fished slowly along weed edges are surprisingly effective for both trout and bass.