I'll dig around and see if I can find the trail notes!
Found it!
Finger Lake to Rainy Pass wrote:
This is a tough run with some short stretches of extraordinarily difficult trail.
After leaving Finger Lake, the trail climbs steeply over a ridge to Red Lake, runs along it for a mile or two, swings up a ravine, and then follows a series of climbing wooded shelves interspersed with open swamps. About ten miles from Finger Lake, the trail drops down a series of wooded benches toward Happy River, then onto the river itself via the dreaded Happy River steps. Then it’s down the river to its mouth, up the Skwentna River for a few hundred yards, and back up a steep ravine to the plateau on the south side of the Happy. The trail will cross Shirley Lake, then Long Lake (11 miles from Rainy Pass Lodge) and then run along the steeply sloping mountainside above the south side of the Happy River valley to the checkpoint. There are two nasty stretches of sidehill trail in the last eight miles.
Rainy Pass to Rohn wrote:
It has some very tough trail, including the notorious Dalzell Gorge.
The trail runs in the open on the tundra of Ptarmigan Pass from Rainy Pass Lodge to the mouth of Pass Creek, which it then follows northwest up to the summit of Rainy Pass itself. Then there are several miles of sometimes steep downhills and often tight, twisting trail through scrub willow southwest along Pass Fork to Dalzell Creek. The trail then drops into the infamous Dalzell Gorge for a few miles and finally onto the Tatina River for the last five miles to Rohn.
Rohn to Nikolai wrote:
This run breaks into three natural sections: 20 miles along the south side of the South Fork of the Kuskokwim from Rohn to Farewell Lakes and up onto the Farewell Burn, 35 miles across the Burn itself to Sullivan Creek, and then 20 miles north from Sullivan Creek past Salmon River to Nikolai.