+1 for the Moose Creek Cafe in Walden, always stop there for a bite to eat when heading up Poudre and on then down around to RMNP.
a bit of a ride but The Sportsmans Texaco in Lake City on the Silver Thread scenic byway is a great place to take a rest if you're riding in that region - http://www.sportsmanstexaco.com/
I'm also a fan of The Brown Burro in Fairplay for a late breakfast.
and oooh yah, theres a little BBQ spot in Frisco called Q4U on the east side of hwy 9 that I stopped at for the first time this past fall.. great food.
anyone know any good eats in Kremmling?