There are over 800 miles of streams and 500 lakes within Kings Canyon National Park. Access is the major problem into the Middle Fork area since it sits in the deepest canyon within the United State at 8,350 feet below Spanish Mountain. The Middle Fork consists of Rainbows and Browns, with Brookies in it's upper reaches. Taking the Crown Valley trailhead to Tehipite Valley, the trail goes about 1 mile through the fairly level valley and then resumes a steeper ascent for about 2.5 miles up to Blue Canyon, which also has a spectacular waterfall. Lost Canyon is about 5.2 miles upstream from Tehipite Valley. At the Lost Canyon convergence you are at 4,600 feet elevation. Alpine Creek is about 6.5 miles upstream from Tehipite Valley at 5,400 feet elevation.
Above Alpine Creek, the MF Kings goes through a broader valley for about 7 miles at Simpson Meadow. The trail goes alongside the river with an exit trail at Horseshoe Creek. The Horseshoe Trail will get you over the 11,000 feet peaks into the SF Kings at Copper Creek, about a 16 mile trek.
The South Fork of the Kings from the confluence with Copper Creek downstream to the Hwy 180 crossing at Boyden Cave is open all year with a 2 trout limit. The waters above the confluence of Copper Creek are open the last Saturday of April to Nov. 15th. This is also true for the Middle Fork and all it's tributaries. Even though the South Fork is technically open year round, the road is usually closed after Nov 8th and does not reopen until snow melt which could be in late March. With an early warm spell, the river can be a rushing torrent and fishing will not be possible until the water levels come down and warm up. Generally, the river is fishable by the end of April. As you approach the Cedar Grove Trailhead, the SF Kings tends to be pocket water with mostly Browns in the 10-12 inch size. Above Cedar Grove, the river becomes much slower but with plenty of trout in the 8-10 inch class.
April brings Golden Stoneflies, so try using #10-12 Kaufmann Stoneflies in tan or mottled black and brown. Caddis flies are also present in April as well as March Browns. Try using a CDC Cripple, a #12 reddish-brown Parachute Hares Ear, or a Comparadun. When there are late periods of runoff, the Upper Kings might not be fishable until mid-June. A combination of Golden Stonefly Nymphs and a size #12-14 dropper of a Prince Nymph, Hare's Ear, or Pheasant Tail will help get the rig down into the deeper reaches of the river. As the river further drops, try attractor dries, such as an Orange Stimulator (#8-10) or a Parachute Adams (#12-16). A spotted caddis hatch occurs in September, use a Kings River Caddis, size 12-14. Try the pocket water and micro-eddies near shore. Concentrate on water that is 3-4 feet deep.
Many feel that the Upper Reaches of the Kings River is one of the best wild trout fisheries on the west slope of the Sierra. What the river may lack in sizable fish, it makes up for in quantities. Survey results from the State of California show that most of the fish within the South Fork Kings are Browns and Rainbows in the 6-8 inch class with a few larger ones up to 14 inches.
From the Trailhead at Cedar Grove you can take a trail up Lewis Creek to the following areas:
Lewis Creek: Lewis Creek extends for about 6 miles from the outlet of Lewis Lake at 10,000 feet. It drops down to about 4800 feet where it meets the SF Kings. Consists of Rainbows, Brookies, and Browns.
Kennedy Creek:About 10 miles from the trailhead. Kennedy flows northerly from East Kennedy Lake at an elevation of 9600 feet and flows alongside the trail for 3.5 miles down to 8600 feet and continues on to the MF Kings.Consists of Rainbows and Brookies.
Swamp Lakes: This is a group of 6 lakes and 8 lakelets within three canyon basins all draining into Lost Canyon Creek. The most northwestern of the lakes is fishless and the lake below it is scheduled for fish removal. The other two lakes might have fish, one is reported to have a few large rainbows.
Slide Lakes: Consists of three lakes, a couple of lakelets and four swampy areas. All of the area is fishless. The middle lake is scheduled for fish removal for confirmation. This will be an amphibian restoration region.
Kennedy Lakes: Two Lakes, East Kennedy and West Kennedy below Kennedy Pass on the Monarch Divide. East Kennedy is closest to the trail, a quarter mile due east at 10,190' elevation. This lake is fishless. West Kennedy can be accessed following the West Fork of Kennedy Creek up to the lake at 9,993' elevation. This lake is also fishless.
From the Trailhead at Copper Creek you can take a trail ot of the canyon with a 5000' climb over 6 miles to the following areas:
Grouse Lake: From the trail at the 6 mile mark, follow the outlet stream 0.6 miles to the lake. Grouse Lake, 10,469' elevation, used to have Rainbows prior to 1980. They died out due to lack of spawning habitat and the lake was barren from about 20 years. Sometime in the mid-nineties someone planted Brookies within the lake and the Brookies have continued to do well. They average 9-11 inches.
Granite Lake: Elevation at 10,450 feet. At the 7 mile mark on the trail, you reach the Granite Lake Basin. Proceeding another mile on the trail you reach the largest lake within this basin, Granite Lake, and must hike a half mile off-trail to reach it. About 9.5 miles from the trailhead. Consists of Brookies.
Kidd Lakes: Most take the pass below Munger Peak to access this area from the Copper Creek Trail. You must go 2 miles northeast from Grouse Lake off-trail. This route will drop you into the first lake on the South Fork of Kid Creek. The South Fork Kid Lake at 10620' is fishless. Following the outlet stream down from the South Fork, you reach the confluence of the Middle Fork. The lower two lakes, 10,400' and 10,500' elevation, of this middle fork have rainbows up to 11". 10.5 miles from the trailhead. The North Fork lakes are also fishless.
Crossing the Granite Pass on the Monarch Divide, 10 miles from the Copper Creek Trailhead, you can access the following:
Volcanic Lakes: Series of about 10 lakes from 9,400 feet to 10,400 feet in elevation. About 12.5 miles from the trailhead. You need to go over Granite Pass and hike on a spur trail to the northernmost lakes above the West Fork of Dougherty Creek. Working your way upstream, you'll encounter most of the lakes. Almost all of the lakes consist of Rainbows.
Glacier Lakes: Going off-trail for one mile east of the Copper Creek Trail from the MF of Dougherty Creek you can reach the westernmost Glacier Lake. The lower lake ia at 10,149' and contains Golden and Rainbows up to 11". The upper lake is fishless. Another group of lakes is another mile to the west at the end of Glacier Valley. The lower Glacier Lake at 10,429' elevation contains Goldens, 7-9 inches. The upper lake is fishless.
State Lakes: Two lakes at 10,300 feet and about 14 miles from the trailhead. Upper State Lake is shallow and fishless. Lower State Lake consists of Goldens and Rainbows.
Horseshoe Lakes: 8 lakes about 2 miles north of State Lakes. Three of the lakes are fishless and four of the lakes are scheduled for physical fish removal. Only, the lake are at 10,223 feet elevation next to Horseshoe Meadows consists of Rainbows.
Middle Fork of the Kings River (Simpson Meadow): A trail follows the Middle Fork down to Tehipite Valley. You can exit out on the Crown Valley trail to Wishon Reservoir. Or, you follow the trail upstream up into Le Conte Canyon and exit out at South Lake (on the East Side Sierra). All of the Middle Fork has good fishing for Rainbows in the 8-10" size class. Closer to Tehipite the rainbows can reach 10-12".