To get out of Logan, you can simply backtrack south on US 89-91 through Sardine Canyon and Brigham city to I-15, or you can continue northward on US 91 through Preston, ID, and eventually return to I-15 about 33 miles south of Pocatello, ID.
You can also head west on 200 North/UT-30. 20 miles to I-15.
