Big Lost River 8-13-13
Flow out of Mackay Dam is a bit over 350 cfs. Craneflies are quite active and fish in the river below are responding well. Wade carefully or consider a float trip.
Flow out of Mackay Dam is a bit over 350 cfs. Craneflies are quite active and fish in the river below are responding well. Wade carefully or consider a float trip.
Here’s good news for those enjoying fishing Chesterfield Reservoir. IDF&G has decided not to issue a salvage order for that reservoir. The dam is closed, so water is beginning to accumulate in the reservoir. With less than 15 feet of water at the dam, all we now need is a good snow winter to fill the reservoir and bring back the great fishing it for which it is famed.
Flow out of Palisades Reservoir has been stable (about 9800 cfs) for at least a week, but water temp at the dam is 65 deg. F. That’s a bit high for best fishing and it shows during day time where riffle fishing could be better. Early in the day is best with mutant stones beginning to show and some PMD spinners showing up. During day time hours consider trying side channels. Many of these are not disturbed by boat traffic, and they are bordered by grass and other overhanging cover. That makes for good hopper habitat, and even during bright daytime can offer some good fishing.
Morning spinner falls offer the best fishing on the Harriman-Last Chance reach of the river. After that switch to terrestrial patterns and hope for a cumulus cloud build up that means increased relative humidity. This action could result in enough speckled duns to interest trout. Towards evening look for some caddis activity. But when the sun goes behind the hills to the west, put on that hair mouse pattern, and place it near an undercut. You may get nothing, but if a trout responds it is certain to be very large—maybe the trout of the year for you!
Right now the Park is crowded with tourists. But good roadside fishing is possible. The Madison and Gibbon Rivers are warm enough to make for slow fishing except early in the day when tricos are beginning to show. Obsidian Creek is full of eager brookies, but a braggin’ fish would be around 12 inches. So use a lighth weight system. A more interesting location would be near the northeast part of the Park where trout in the Lamar River and Soda Butte Creek are responding well to grasshopper patterns. The same should be happening on Slough Creek’s meadows. Another possibility is the Gallatin River in the Park where evening caddis emergence can bring fish up.
Flav emergence on Big Elk Creek is in beginning stages and the same should be happening on Palisades Creek. If you fish before early afternoon bead head nymphs work, but presenting grasshopper and ant patterns is more fun. Concentrate on presenting these just in front of undercuts and grassy overhangs. Water temp has to get to mid 50s before flavs begin emerging. This means mid afternoon at least. Best action for fish chasing flavs will begin around 4PM and last for two or three hours. Day with skies clouding up will be best for action. Any pattern resembling an emerger or dun (size 12) will interest the cutts which range up to a size rivaling those in the South Fork below. The country here is tinder dry, so be careful with any flammable items.
Flow out of Palisades Dam dropped to 11000 yesterday. Water temperature just below the dam is 65 deg. F. That’s getting a bit high for the best fishing, especially because we can expect further decreases in flow. Palisades Reservoir is down to 28% capacity. Early in the day fish chernobyl types because mutant stoneflies are coming on. By late morning go to rubber legs trailed by your favorite small nymph pattern. During evenings a good caddis hatch is on-going, making for the best dry fly fishing these days.
Streamer fishing has been holding up (fish early, fish late) fairly well even with some increase in flow. Fishing from a boat is better than wading for now. When waters drop later in the summer more wading opportunities will come around.
We have reports that the gulper action on Hebgen Lake has been somewhat spotty lately. Most of these reports come from folks fishing the Madison Arm, which usually offers the best during gulper season. But it is early in this season, so there is plenty of time for improvement. When we receive reports of better action, we will post them here.
Some meadow streams here are doing fairly well with respect to water flow. Fall River Basin streams and the Gibbon River are amongst these. The Lamar River and other northeast corner streams are not so lucky with flows considerably below normal. So fish early, fish late really applies there. For all these your best chances will be days with enough cumulus clouds to threaten thunder showers. Cumulus clouds indicate increased relative humidity, and this helps much in aquatic insect hatches. Drier air of those bright days means these insects will dry out more quickly allowing shorter time to mate and lay eggs, so they have evolved to hatch in bigger numbers when relative humidity increases. This coupled with good water flows (such as in Fall River Basin streams) hints at when and where to find best fishing success during these hot dry days. All this really does not apply to terrestrial insects, but add the active aquatic insects (speckled duns are in case in the waters given above) and you have a better chance at good fishing!