Colorado mountain hikes were fun with Max. I used to stay at a motel in Greeley that was pet friendly, but they have since changed their policy. I do know that on some of the booking sites they will tell you if pet friendly or not. Some of the cafes in Colorado City, Estes, etc have outdoor tables where you can have your dogs with you. Always kind of fun to window shop the little quirky tourists stores, go to a cafe and have a little drink and bonus! you get a tired out pup who will sleep if you decide to skip out of the room to catch a movie.
Besides that, I lived on the gulf coast for a bit when Max was young, and some of the towns on the Texas coast are very small, not many people on the beach during the weekday. Matagorda Beach was the one we lived near, and there were no restrictions. We also pitched a tent on the beach at Port Aransas with no issues. I actually am hoping to be able to take Moose down to the Texas coast sometime before long. My preference would be in an RV, maybe renting one for a week or so. (I can only image what kind of deposit they'll require tho). Maybe I should just sell my Mustang and buy a small RV!