Underdahl, Mark Gregory age 71 passed away unexpectedly on 10/25/2021 Visitation 4-7pm Thursday, 11/11/21, Grandstrand Funeral Home (6580 Main St) North Branch, MN 55056. Funeral service/luncheon 11am Friday, 11/12/2021 at Access Church (4359 392nd St.) North Branch, MN 55056. In lieu of flowers memorials preferred. Grandstrand Funeral Home grandstrandfh.com