Fly Fishing on the Kenai:
You need to take at least an 8 weight rod for Fly Fishing for Salmon on the Peninsula, and a 9 weight is better. The currents in most of the rivers makes it almost impossible to horse any fish, unless you have line that is over sized. A 20 pound leader can be snapped by a 10 pound fish in these waters. Fly Rods are the exception since the rod can take a lot of the impact. Still I would not use less than a 20 pound test tippet, and I highly recommend weight forward, sinking line.
Salmon on the Kenai will not hit much. Once they are in Freshwater they bite out of frustration, they will pick up eggs to prevent them from being eaten by other species, and they will attack predator fish. One of the few small predators is a small green sculpin like fish that is a bottom feeder. Flies in a green color similar to the sculpin can provoke a strike. Reel up accordingly.
For Streams and Lakes on the Kenai you can use a 5 or 6 weight rod, and if you are a skilled angler who wants to fish for Grayling a 4 weight rod and reel will work fine. Grayling on the peninsula normally do not get much over 2 pounds with most being in the 6 to 10 inch size range.
Flies for the Kenai and other rivers are basic. Egg patterns are about the only thing that works for trout. On Occasion an Egg Sucking leach with a bead above the fly will work, and occasionally something that looks like the native sculpin will attract a bite. Beads must be either free to move on the line, or pegged less than 2″ from the hook.
For the Grayling, mayflies, stone flies, and caddis flies are the main surface baits for these fish.
Grayling can be readily taken on dry flies, streamers, small spinners, spoons and bait such as eggs. They feed occasionally on the surface, so if you do not see insects on the surface, or fish feeding, start with below surface lures. Neutral buoyancy line may be the best bet for fly fishing for these delicate, and colorful fish. Unless you want to pack in an extra spool or reel. You can use both sinking and surface lures this way. Rainbow Trout can also be found on most lakes where the Grayling are found. Grayling can be caught during most of the ice out season, but can only be kept AFTER the 1st of July on the Peninsula. Grayling are found above 3000 feet only. So only a 2 lakes on the Peninsula have Grayling in them. Grayling Lake which is 1.6 miles off the Seward Highway at mile 13.3 and Crescent lake which is accessible from 2 different trails. One is at mile 33.1 on the Seward Highway which is a 3 mile walk. There is also a trailhead near Kenai Lake on the Sterling Highway. That walk is about 2.5 miles.
Pike can be found in several lakes on the Peninsula, and if caught you have to keep them. Pike is an invasive species and should not be released. It damages the salmon populations, and causes problems for native species. Reports of Pike in the Moose River drainage and the Swanson River drainage have not been substantiated, but should you encounter pike in these water please keep them. There is no limit on Pike. Lures for pike need to be large, and streamers and spinners work well. Stormy Lake is the only lake currently with public access. One other lake on the Peninsula that has pike is Scout Lake. Other lakes surrounded by private property have pike and PERMISSION is required to fish these lakes. Alaska has a wanton waste law. If you do not plan to keep fish and clean them, then donate them to a local charity. Large fines are applied for taking game and not cleaning it for food.