I don't know what a MUT is, but I've ridden the Centenial trail from Snohomish to Arlington a couple of times and then gone back to Snohomish via Burn Rd, Granite Falls, Monroe, even Sultan, Ben Howard RD, etc. You live in a wonderful biking area, much superior to the Roslyn/Cle Elum area where I live. Here we have some good loops, but you have to go out early in the day to avoid horrendous winds, and we have poor, bumpy chip seal roads. I also enjoy going up to the Mt. Vernon/Bellingham area for good roads and rural rides. In 2004, I rode the Olympic Peninsula loop. It is a great ride and I thoroughly enjoyed every day. It was 4 days, 322 miles. I have yet to ride the North Cascades full route, but have been on parts if it.