The road to Assiniboine Lake is in good shape once you leave the mine road with the possible exceptions of the two bridges. Please note that this road is NOT a Forest Service Road (FSR) but a Wilderness Road and is not maintained by anyone. This means the two bridges you cross on the way to the trailhead are not maintained nor inspected so you cross at your own risk.
The trail is in good shape and as well as the log bridges. There are 4 large trees across the trail but are easy to get by.