1983 Trails Illustrated map of GUMO with notes from three 1986 backpacking trips. Upper section. February 22, 2020 × 1983 Trails Illustrated map of GUMO with notes from three 1986 backpacking trips. Upper section. 1983 Trails Illustrated map of GUMO with notes from three 1986 backpacking trips. Upper section. Discover more from Phieldnotes Subscribe to get the latest posts sent to your email. Type your email… Subscribe