Map of Upper Animas
Another source is "Cinders and Smoke", (A book about the NG Railroad), The Train also sells a map which shows the entire run on one sheet. These are not as detailed as the topos, (5 or 6 maps to cover the area). However, the train map shows the major drainages and the train miles, (a useful locator).
What we do in life, echoes in eternity.