Flex Berthoud Homecoming Detour. Effective 10/8/2025. Southbound on 1st: Straight through roundabout, right on Welch Ave, Right on 8th street, left on mountain avenue, continue normal routing. For Northbound: Northbound on Mountain: right on 8th street, left on welch avenue, left on 1st street, through the roundabout, continue normal routing. Stops closed at Mountain and 2nd, mount and 3rd.