The approach to the South Route of Black Peak: 1 -- Heather Pass; 2 -- leads to Black Peak Col (on south side of peak); 3 -- the standard route to Corteo Peak; 4 -- a much reduced Lewis Glacier; 5 -- Corteo Peak (8,080+ ft); 6 -- Maple Pass; L -- Lewis Lake; W -- Wing Lake. Oct. 6, 1996.