FROM THE AIR. Rising 2,700 feet above sea level and measuring roughly 2.5 miles long and half as wide, Har Karkom is a relatively modest mountain ridge. The archaeological evidence suggests to the excavator that a unique religious center existed here from 4300 to 2000 B.C.E. and served as the inspiration for Biblical Mt. Sinai. To make the evidence fit the Biblical account, however, Anati pushes the date of the Exodus back 800 years from the traditional date of about 1200 B.C.E.