Business Loop I-15 - Lake Elsinore

The Lake Elsinore business route for I-15 comprises both a 3.3 mile loop along Diamond Drive, Lakeshore Drive and Main Street (old SR 71) between Exits 73 and 75, and also a 2.6 mile long spur extending west on Lakeshore Drive to SR 74. According to the California State Highway System Signing Log (October, 1991), Business Loop I-15 runs from Interstate 15 and Main Street over Main Street to Graham Avenue. Loop 15 "north" runs from Main Street over Graham Avenue to Riverside Avenue (SR 74), and Loop 15 "south" runs from Main Street over Lakeshore Drive and Railroad Canyon to Interstate 15.

Business Loop I-15 through Lake Elsinore is locally maintained and poorly signed beyond the freeway. A sign assembly previously acknowledged the north end of the business loop at SR 74. It was removed sometime after 2011 during a landscaping project for a local business.