In the first post of this thread I described logging roads/snowmobile trails that can be used to link the Garfield and Gale River Trails.
Later in this thread I described a possible, but long, link between the Garfield and Skook trails. It is obvious from the AMC map that there is a logging road/snowmobile trail (part of Corridor 11) that goes from the Gale River Loop to Haystack Road, and can therefore be used to connect the Gale River and North Twin trails.
It is clear from the map that it is long, with quite a bit of elevation gain. Since it did not seem to be a viable option for a Twins-Gale loop with one car I did not "explore" it. I put the word explore in quotes, since, given that it is a major snowmobile trail, there was no question about its continuity and maintenance.
Today I was not in the mood for a "real" hike, but wanted something more interesting than my usual walks on Rt 175 or Tripoli Road. So I decided to go do it, measuring its length and elevation gain with my GPSr.
Years ago I had driven on the Corridor 11 from the Gale River Road to the gate on a trip to PAtN. The road to the gate is still well maintained and fully driveable. From the gate to the second gate at its junction with Haystack Road it is wet, with quite a bit of shrubby growth. Beyond that I walked Haystack Road to the trailhead, and returned to my car.
The distance, according to my GPSr, is 5.1 miles each way There are about 550 feet of elevation gain going from Gale River Trailhead to the junction with Haystack Road, and almost exactly the same in the opposite direction. Going to the Twin trailhead adds about 250 feet of elevation gain.
At the highest point of the traverse there is a big recent clearcut on the northern side of the trail, and it gives a good view on the far northern peaks. That, I believe, is the only redeeming feature of that route
Like the Skook to Garfield segment this is probably too long to be really useful in doing a loop. I do not expect to hike it again.