Mountain Ave Cracks

There are three hard thin buildering cracks on Mountain Ave in the Montclair district of Oakland. They are right on the street just north of the main business area. One is on the retaining wall on the west side of the street above the recreation center. The other two are on the opposite side of the street. The cracks are ~5.12 and 20'-35' tall. It would be best to only go here when the area is quiet like early Sunday morning.