It helps to do the math. Tangent 21 degrees = .384 = 38.4 % grade. This is around 5 times steeper than most anything you'll see driving around the Rocky mountains of Western USA. Very difficult to climb out of, even when not wearing a bulky space suit.

Important to remember, even though moon gravity is 1/6th earth (1.62m/s$^2$), there is no "terminal velocity" due to lack of air drag. A long lunar fall would be lethal.

A 21 degree slope is very steep, and the astronauts exercised proper caution.

It helps to do the math. Tangent 21 degrees = .384 = 38.4 % grade. This is around 5 times steeper than most anything you'll see driving around the Rocky mountains of Western USA. Very difficult to climb out of, even when not wearing a bulky space suit.

Important to remember, even though moon gravity is 1/6th earth (1.62m/s$^2$), there is no "terminal velocity" due to lack of air drag. A long lunar fall would be lethal.

A 21 degree slope is very steep, and the astronauts exercised proper caution. One held a rope tether while the other began to descend into the crater. The plan was to walk down the crater wall in a spiral fashion, and early on they found the footing firm enough to proceed, making it to Surveyor 3, which had landed there in April 1967.