This could be my new favorite - close tie with the Tour de Blast.
Small ride - maybe 60 to 100 riders doing the full 128-mile ride? Great weather (a little wet and cold at the top, but no rainfall or snow).
Well organized ride - great support, great food, SAG wagons were out in force.
This is one of the most spectacular highways in North America, but tough to do without support (no services between Mazama and Newhalem). Great ride to do with a group, like this.
Full report and many pics over at the 50+forum.
133 miles over the spectacular North Cascades Highway - new p.r. bike ride