Soft slab triggered by about the 2nd turn. Failed within the new snow most likely and ran slowly for about 70 feet. This could have been a lot bigger if either wind or snow events recently had been any greater. Snow was soft and stubborn but sluff that if unmanaged, could sweep you off your intended course. Good indication to stay weary of steep terrain, many riders in the backcountry today riding without issue does not mean that there is no avy danger.