Saco River Medical Group - Glen. 15 US Rte 302, Glen, NH 03838. Appointments: Call (603) 447-3500 or Request through our Patient Portal ; Walk In Service. Our Walk-In service is open on a first-come, first-serve basis. Conway Monday - Friday - 8AM to 6PM Saturday - 8AM - 4PM Sunday - 9AM - 1PM.