Climbing Speed
Speed Type
A 
Climbing Speed can be used to move on a vertical surface without expending the extra movement normally associated with climbing.
Some creatures have the 
Spider Climb Effect, which allows their Climbing Speed to work even on the underside of horizontal surfaces.
Creatures without a stated Climbing Speed move at half speed. It is then up the 
GM to determine if Endurance or Balance should be used. Sheer surfaces have a DC of 20, while difficult surfaces with grips or objects to grab onto should have a DC of 15.
d100
Mod
ADV/DIS