Business Loop I-15 - Pocatello

Business Loop I-15/US 30-91 north split in Pocatello, ID — U.S. 30 separated from Business Loop I-15/U.S. 91 north in Pocatello for an expressway leading west to I-86. This set of signs was replaced after 2008 when the intersection of Pocatello Avenue and Oak Street was expanded to include dual turn lanes for U.S. 30 west and two through lanes for Yellowstone Avenue north. Photo by Kelly Kawamoto (09/05/00).

Interstate 15 travels along the east side of Pocatello on a hill overlooking the city while Business Loop I-15 provides direct routes to both the city center and Idaho State University.

The route branches northwest from Exit 67 along 5th Avenue, which doubles as U.S. 30/91. The three routes separate into a couplet with 4th Avenue carrying southbound traffic to Pocatello Avenue. U.S. 30 splits with the business route at Oak Street while U.S. 91/Business Loop I-15 shift to Yellowstone Avenue, a five lane commercial boulevard.

U.S. 91 remains north along Yellowstone Avenue en route to Chubbuck while Business Loop I-15 turns east along Alameda Road and Pocatello Creek Road to end at Exit 71. The Business Loop I-15 overlap with U.S. 91 was well signed as of August 2016, while the branch to Exit 71 was less acknowledged.

Updated July 31, 2026