The Williams Fork River is best known for its tailwater section, which is released from the Williams Fork Reservoir, and flows into the Colorado River a few miles downstream of its origin. The Williams Fork tailwater fishes best when it has enough CFS to entice fish from the Colorado River to run up it ( lets say between 100-200 CFS). a solid population of midges, Baetis, PMD’s, and caddis exist in the Williams Fork below the dam. Also notable are mosquito’s that develop in this area, they are second only to the mighty mosquitos of Muddy Creek. Bring DEET, cover all skin, and wear bug nets during peek mosquito season. A light nymph rig is the norm for fishing this stretch of water, although strong hatches can produce solid dry fly fishing at times. Streamer fishing can also be good here in the fall.
Nymphs To Try: TDJ Golden Stone size 12-16, Pheasant Tails size 16-20, Shot Glass Baetis olive size 18-20, BLM in black size 18 - 20, RS2’s size 18-22, Buckskin Caddis size 14-18, Zebra Midge black or olive size 18-22, Barr's Drowned Trico 20-22, and a variety of midge larva/emergers.
Dries To Try: Chubby Chernoble tan/gold size 8-14, Matthew's Sparkle Dun olive size 18-22, Missing Link Caddis size 14-16, Parachute Adams size 16-20, Rusty Spinner size 14-16, Morgan's Midge size 18-20
Streamers To Try: Think small to medium when chucking meat here.... Slump Busters, Wooly Buggers, Meat Whistles, Baby Gonga, and leach patterns.
River flow is in a good zone for fishing at about 100CFS, and the mosquitos won’t be quite as bad with the colder temps we have been seeing at night. Another bonus is the upcoming Brown Trout spawning season, which will inspire quite a few nice fish from the Colorado River to run up stream into the Willy Fork. Hatches this time of year can include Sporadic PMDs and Caddis, but will be heavier with Tricos, Baetis, Red Quills, and Midges. Aggressive Brown Trout can often be enticed to chase a small to medium streamer as well.
The Williams Fork is Flowing about 175 CFS which is right where we like it. This is a great time to fish the entire stream rather than just the confluence with the colorado. a hopper dropper set up could be good if it seems like fish are eating near the surface, otherwise use a light nymph rig so you can adjust your depth appropriately. Caddis, Blue Wing olives, and Midges have been most prevalent recently. KEEP IN MIND THE MOSQUITOS CAN BE VERY BAD HERE, BRING BUG SPRAY AND APPROPRIATE CLOTHING.
The Williams Fork tailwater is still experiencing low flows at about 40 CFS. We have heard of trout being caught both in the confluence area with the Colorado, as well as further up the river as well. A light nymph rig, or dry-dropper set up should get the job done at this point in time. Look for hatching Golden Stones, Baetis, Caddis, and Midges. Keep in mind that mosquitos can start getting pretty bad on the Fork this time of year.
Flows have remained low on the Williams Fork this spring, and probably will remain that way until the reservoir starts to fill up more. Currently there is about 300 CFS going into the Reservoir and about 40 CFS coming out. The confluence with the Colorado will be the most productive section of the tailwater for the next weeks to come as, but it will also see heavy fishing pressure. Expect stonefly nymphs, Baetis, caddis larva/pupa, midges, and streamers to be on the menu.