Below Teigen Creek the Bell-Irving River turns south and southeast. This part of the river valley is used by the Stewart-Cassiar Highway, British Columbia Highway 37. Snowslide Range lies west of the river, between Teigen Creek and Treaty Creek. Oweegee Creek and Skowill Creek join from the east, then Treaty Creek joins from the west. Treaty Creek is so named because it marks the traditional boundary between Nisga'a and Tahltan territories, following a mid-19th century treaty made between these peoples.