Seems like a good trip to stop off for a cinnamon roll at Johnson’s Corner.
As for breweries, I haven’t been to any of these myself, but all of these breweries in Ft. Collins on Eater’s list are a short detour off of I-25: https://denver.eater.com/maps/best-breweries-fort-collins Or you could go to this lil microbrewery.
If you are a Colorado native, you’ve probably already had this, but if not, might be worth a stop at the Ft. Collin’s Beau Jo’s pizza. Fair warning: it’s not great pizza, but it is, um, unique. If you do go, get some honey to dip your crust in. Kinda like Colorado’s non-spicy version of Roberta’s “Bee Sting.” Ish.
Paging @foodie4life in case he’s made the trek recently and has any wisdom to share.