Banks-Vernonia Trail Extension is a hiking and biking trail in Vernonia, Oregon. It is within Vernonia Lake City Park. It is 1.8 miles long and begins at 615 feet altitude. Traveling the entire trail is 2.2 miles with a total elevation gain of 50 feet. Near the trailhead there is parking. The Vernonia Lake Primative Campground camp site can be seen along the trail.