The falls are flowing for the first time in several years. At 300 feet, it's San Diego County's tallest waterfall.
According to "San Diego County Place Names, A To Z) by Leland Fetzer, the waterfall is most likely named after Mildred Williams - a Julian resident in the early 1900's. Mildred committed suicide here by leaping into the falls.
I shot this at 25 sec f/6.3 ISO 1600 600 mm using my Canon 6D.