Take a look here: https://www.visitutah.com/things-to-do/fall-foliage/
Provo Canyon is a good possibility, but I lov Soldier Hollow up near Deer Valley. Gorgeous aspens as you head to the Wasatch State Park. Big Cottonwood Canyon and Little Cottonwood Canyon (the roads to Brighton, snowbird, Alta, Solitude ski resorts) are drop dead gorgeous, but they are very crowded, especially on the weekends. Also note that many of the mountain areas, including the Cottonwood Canyons, do not allow dogs at all. However I have no idea of the current forecast for when the colors will come.