Some of my favorites when traveling.
Flying Saucer Pie Company, Houston Texas (loved the strawberry cream pie)
You Need Pie Diner and Bakery, Estes Park, CO
Pie Town, NM
Croshaw's Gourmet Pies, St. George, UT
Gifford House at Capitol Reef NP, Torrey, UT
Sweet Cravings Bakery, Moab, UT
Some...