UPDATE – M&N Main Line – Schwartzburg to Hilbert New information and photographs of Cedarburg, Wis., have been added to The Milwaukee & Northern Main Line from Schwartzburg Junction to Hilbert Junction page. The former M&N main line at Cedarburg, Wis., on 11 February 2021. Photograph by Tom Bruss.The former M&N main line at Cedarburg, Wis., on 11 February 2021. Photograph by Tom Bruss. You Might Also Like UPDATE – Meeting Nights November 19, 2023 UPDATE – Main Line – Menominee River to Ontonagon August 22, 2022 UPDATE – Main Line – Schwartzburg to Hilbert August 15, 2025