Utah · Fishing
Fishing in Koosharem, Utah
Koosharem sits in the Sevier Plateau at roughly 7,000 feet, and the fishing around it reflects that high-country character: cold, clear water and a concentration of stillwater options within a short drive of each other.
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Koosharem sits in the Sevier Plateau at roughly 7,000 feet, and the fishing around it reflects that high-country character: cold, clear water and a concentration of stillwater options within a short drive of each other. Koosharem Reservoir and Rex Reservoir are the most accessible local waters, while Fish Lake — managed under the Richfield Ranger District — is the area's most well-known destination and one of the few Utah lakes where you have a realistic shot at mackinaw (lake trout) alongside rainbow and splake. Paradise Valley Lake and Forsyth Reservoir round out the options for anglers who want to explore beyond the obvious. Most of the fishing here is lake and reservoir fishing; the Koosharem Day Use site is one of the few spots listed with surf fishing access, which on an inland reservoir typically means fishing from the shoreline rather than a boat. The elevation keeps water temperatures down through summer, which is good news for fish activity and for anyone who finds lower-elevation Utah fishing too warm by July. Access ranges from developed day-use areas to dispersed sites like Cold Springs, so you can choose between a picnic table and a tailgate depending on your preference.
Frequently asked questions
What fish species can I expect to catch around Koosharem?
Fish Lake is the place to target mackinaw (lake trout), and it also holds rainbow trout and splake. Koosharem Reservoir and Rex Reservoir are stocked with rainbow trout. Check the Utah Division of Wildlife Resources stocking reports before your trip for current conditions at the smaller reservoirs.
Do I need a boat, or can I fish from shore?
Most of these waters are fishable from shore. The Koosharem Day Use site is specifically listed with shoreline access, and dispersed sites like Cold Springs give you bank access without a developed launch. Fish Lake has boat ramp infrastructure if you want to troll for mackinaw, which is the most effective method for that species.
What time of year is best for fishing near Koosharem?
Late spring through early fall is the primary window, with ice-out timing varying by year at the higher reservoirs. Summer mornings and evenings are most productive once surface temperatures rise. Ice fishing is possible in winter on Koosharem Reservoir and Fish Lake, but confirm ice thickness and access road conditions before making the trip.
What gear should I bring for lake fishing at this elevation?
A medium-light spinning setup with 4-8 lb monofilament or fluorocarbon covers most situations at the smaller reservoirs. For mackinaw at Fish Lake, heavier trolling gear or a jigging setup with larger spoons is more appropriate. Bring layers regardless of the forecast — at 7,000-plus feet, afternoon weather can change fast.
Is this area suitable for beginner anglers or families?
Yes. The Koosharem Day Use site and Koosharem Reservoir both offer easy shoreline access without technical terrain. Stocked rainbow trout at the local reservoirs are more forgiving for newer anglers than chasing mackinaw at Fish Lake. A Utah fishing license is required for anyone 12 and older, and you can purchase one online through the Utah DWR before you arrive.
