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Pro Tips
Many thanks to Rene' for donating his time with Ian and his gracious hospitality, also thanks to Bonnie Harrop and Masa Katsumata for the accompanying photography.
In keeping with your directive, young Ian Crabtree was greeted at the hospitality pool by a gallery completely qualified to administer the formal indoctrination ceremony for rookies on the Henry's Fork.
Wintering whitetail deer were not forced to concentrate in the river corridor for forage as in years past, and I have yet to see a single casualty of the cold season. Without severe icing influencing their survival, Trumpeter Swans and other waterfowl were free to access the entire length of the river thereby avoiding crowding and over harvesting of aquatic vegetation. Vulnerable mammals like muskrat also benefit from less severe conditions, and spring numbers of these gentle creatures attest to an easier life during the past winter.
Lower snow levels have permitted the observation of many spawning areas that would otherwise be difficult to reach in typical early spring conditions. Reproductive activity in these key locations is perhaps the best indicator of trout populations separate from actually fishing. Impressive is the best word to describe the numbers and individual size of spawning rainbows observed from early March through the end of April. The volume of predatory activity from Bald Eagle, Osprey, Loons, and river Otter might be troubling to some but it takes a strong fishery to attract and support such intense interest. Therefore, it seems logical to consider these wild consumers as positive indicators of a very healthy population of trout.
Mild weather aided by easier access to the water enabled anglers to get an earlier start on waters open to year round fishing on the ‘Fork. Early March found trout rising consistently to abundant hatches of midges and baetis, and this trend continued for more than six weeks. Clearly evident was a higher percentage of brown trout that were coming to a dry fly which indicates a strengthening of this relatively new resident of the lower Henry’s Fork.
Caddis and March Brown mayflies began to appear almost simultaneously during the third week of April bringing with them a nearly unbearable distraction for the heavily burdened fly tyer only thirty days out from the beginning of the general fishing season. Cool temperatures with weekly precipitation are perfect weather ingredients for heavy hatches and rising trout, and this has been the pattern since late March. Also positive in this trend is a strong contribution in the high country to a weaker than usual snow pack.
Key in the outlook for 2010 is winter flows from Island Park Reservoir that exceed anything we have seen on the Henry’s Fork since the late 1990’s. With flows running from 350 to 400 cfs during the coldest months of December, January, and February, a much higher percentage of young trout will survive than in years when winter flows were considerably lower. Large numbers of small trout now concentrated along the edges of the river confirm a continuing trend of improved winter survival that can be largely attributed to the efforts of the Henry’s Fork Foundation. Working in close cooperation with irrigation officials who control the release of water from the Island Park Reservoir, HFF personnel have succeeded in gaining unprecedented consideration for trout in the management of winter flows on the Henry’s Fork.
Aquatic insects that share environmental needs similar to trout are also benefiting from better wintering conditions. Strong hatches and an abundance of rising trout have persisted through the early season and I see little reason to expect this to change as the season progresses.
Concerns for a lower than average snow pack can be alleviated to a considerable extent by a large carryover in Island Park Reservoir that now approaches 100% of capacity. Cool temperatures and above normal precipitation beginning in late March and continuing through April have delayed spring snow melt and irrigation demand thereby improving the water outlook as well. More rain and perhaps even snow dominate the forecast as April draws to a close, and this is bad news only to golfers.
Winter in the adjoining states of Montana and Wyoming has been similar to what has been experienced in Idaho. Anglers who plan to visit the Yellowstone region should not expect to find rivers swollen by heavy runoff in late May and June as has been the case in the past two years, although this could change with continued cool temperatures and abundant precipitation.
2009 on the Henry’s Fork was the best in recent memory with abundant hatches and trout of impressive size and numbers. Based upon customary indicators, it is reasonable to expect fishing in 2010 to equal or even exceed what most fly fishers experienced last year.
Located near the Continental Divide in eastern Idaho, Henry’s lake is the headwater for the equally famous Henry’s Fork of the Snake. Though at times fickle, Henry’s Lake is known for its heavy population of especially large cutthroat, brook trout, and cutt bow hybrids. Hungry for some personal fishing and weary of squinting at tiny Baetis and Midges, the staff members of TroutHunter were also anticipating the opportunity to learn from one of Europe’s most accomplished authorities on still water trout. A Henry’s fork regular despite its distance from his homeland, Masa was even more pumped up than usual for his first shot at the lake known as Henry. While Masa and Gareth had shared numerous days on various waters around the world, this would be Masa’s first opportunity to watch Gareth apply his specialized still water strategies.
There are times when the lake gets hot and everyone seems to be catching fish. This is how things began on the first day on Henry’s when the weather was reasonably comfortable and the trout unusually charitable. Whether fishing from a boat in open water or wading the edges, fishing was fast and furious with no one from the group landing fewer than twenty fish ranging from eighteen to twenty four inches in size.
With more than one hangover following the season end party at TroutHunter Bar and Grill the night before, the group arrived at the lake to find twenty feet of ice rimming the edge. While essentially calm, the temperature was at least twenty degrees colder than during the first two days. As if iced guides and numb fingers were not complication enough, the fish seemed to have developed lock jaw overnight. And it was then that Gareth’s still water skills truly began to shine.
Temperatures improved on the final day but a pesky wind again kept us mostly confined to wading the shoreline. Unfortunately, however, the fish failed to return to the voracious feeding activity that made the first two days so exciting. With a new set of problems to face due to an unfavorable wind direction and discolored water we again turned to Gareth for solutions. Fly adjustment and depth changes soon had us back into business although the catch rate continued to be comparatively low. On the bright side, however, the day produced two big hybrids of more than five pounds and a real giant was lost early that morning before wind forced the boats from open water. The average size improved as well with only a few fish smaller than twenty inches taken.
The vagaries of autumn weather in the high country were manifested by a fierce blizzard overnight but fortunately the roads were clear by noon the following day when Gareth and Masa were scheduled to depart for home. Though their respective flights exceeded 5,000 miles, I’m sure they both carried smiles along with fond memories of a very special lake for the entire distance.
As the original fair weather fisherman, the Osprey’s autumn departure from the Henry’s Fork warns of winter’s arrival. Always the first to leave with the approach of cold weather, Osprey do not return until winter storms become a memory and the hatches of spring bring trout into a position of availability.
Baetis CDC Thorax
Hook: TMC 100 Size 18-22
Thread: Tan 8/0
Tail: Whiting Coq de Leon
Abdomen: BWO TroutHunter Goose Biot
Wing: Natural or dyed Blue Dun TroutHunter CDC
Thorax: BWO TroutHunter Pro Dubbing
The Last chance Cripple is characterized by an abdomen that duplicates the form and color of the nymph.The thorax, wings, and hackle represent a partially emerged dun in shape and coloration. The buoyant CDC wings provide excellent flotation and visibility when fished on choppy water or during low light conditions. These features also cause it to be a perfect indicator fly when a corresponding nymph is suspended from the hook bend.

The colors of the Last Chance Cripple can be adjusted to effectively match any mayfly that emerges on the water.
Tying Recipe for Last Chance Cripple
Hook: TMC 100BL
Thread: 8/0 Uni-thread
Tail: Sparse tuft of Trouthunter C.E.N. dubbing over three Wood Duck fibers
Abdomen: Stripped goose biot or turkey biot tied to appear rather fuzzy.
Thorax: Trouthunter Professional Dry Fly Dubbing
Wings: Paired CDC feathers set at a forward angle over the eye.
Hackle: Whiting Hackle
Rene' Harrop
House of Harrop
33 W 4th N
St. Anthony, Idaho 83445
Tel: 208 624 3537
Fax: 208-624-3455
www.houseofharrop.com