The route is incorrect. Take a RIGHT on Forest Road 170 (also called The Grade).
Also, at some point FR 170 was renamed from FR 153. Newer maps of Superior National Forest all show FR 170, so that needs to be corrected on this page's route map. Nowhere on the actual road does it reference 153, only 170.
Heading north from Lutsen, after turning onto County Road 4, don't be alarmed if some road signs and addresses start referencing "Caribou Trail (Road)". It is the same road for that stretch.