[1] The four-lane highway travels north through commercial and residential areas in the northeastern outskirts of Post Falls and reduces to two lanes beyond the city limits.

SH-41 travels due north through the Rathdrum Prairie, a rural area with several farms,[3] and crosses the Union Pacific Railroad's Spokane Subdivision via an overpass.

[8] The highway travels north through the city of Spirit Lake on 5th Avenue, where it passes a commercial district, and continues northwest into Bonner County.

The highway gradually turns north and passes several disconnected sections of the Kaniksu National Forest as it follows the Idaho–Washington state border.

[15] The Post Falls–Coeur d'Alene section of I-90 opened in October 1970 and included an interchange with SH-41 adjacent to its existing terminus at US 10 (now Seltice Way) and Ross Point Road.

[20] Local governments have proposed the expansion of SH-41 between Post Falls and Rathdrum to a four-lane divided highway since the 1990s, drawing opposition from nearby residents.

[25][26] Funds to widen an additional section were part of a proposed vehicle registration fee increase that was rejected by Kootenai County voters in 2020.