According to the City's website, in order in finalize construction of the new parking lot, the Claremont Hills Wilderness Park will be completely closed to all park users - mountain bikers, CXers, equestrians, trail runners, walkers, and anyone else - on both Wednesday and Thursday, the 20th and 21st of March. In addition, Mills Avenue north of Mt. Baldy Road will be closed those days, as will the southern parking lot.
The new parking lot will open on Friday, 22 March at which time the new no parking regulations for Mills and Mt. Baldy Road will be in effect. Permits will be required to use the two parking lots beginning April 1.