When you say walking down the Cog, do you mean as in along its descent or on the actual tracks? It would be much easier to descend using the trails, such as the Jewell, but that's up to you and how far you plan on going down, as long as its below treeline. Someone else may know this better than I, but I'm not sure at certain times of the year if anyone is able to use the tracks for hiking, especially in the high-tourist month of July.
"LIVE FREE OR DIE...DEATH IS NOT THE WORST OF ALL EVILS." Gen. John Stark. "by reason of much foule weather and Extreme Bad Woods to travel in..." From the letter of my Great Uncle, Samuel Willard (accompanied by my grandfather Henry), to Governor Dummer on August 16, 1725, explaining the reason for his return, being instructed to "range all the country", of the Wawobadenik (White Mountains) July 19-August 16, 1725. I am a 13th generation New Englander and proud of it.