717 Trails system North of Divide. I think they still allow dispersed camping- find an unused spot and camp there. Great trails, easy to hard. Avoid Rampart, especially on weekends. User density is outrageous and they charge to camp now.

Lots of trails and camping north of Steamboat. Flat Tops has some trails, mostly roads but it's awesome up there. Grand Mesa and the Uncompaghre Plateau are great as well. Farther west is Rabbit Valley and then Moab.

Get some maps and go explore.