US 8 begins at an interchange with I-35 in Forest Lake. This interchange is incomplete: traffic can only access US 8 directly from northbound I-35, and westbound traffic on US 8 merges onto southbound I-35. The first segment of roadway to Forest Lake is a freeway, with an interchange at US 61. East of this junction, the highway follows Lake Boulevard North around Forest Lake and continues northeasterly through the community to cross the Washington–Chisago county line. The highway continues to the northeast along farmland and the shore of Green Lake to Chisago City, where it meets up with County Road 22 (CR 22). US 8 follows Lake Boulevard through Chisago City along the isthmus between the larger Chisago Lake and the smaller Wallmark Lake on the eastern side of town. The highway turns along a more easterly path in Lindström between North and South Lindström lakes. East of those lakes, US 8 crosses into the town of Center City.