The Arrowhead Springs line I am very familiar with. I went to Arrowhead School from 1952 to 1958 and I saw that train twice a day, five days a weeks, 9 months out of the year. It did come east on Highland Avenue, then turned north on Mountain View, crossed the Redlands Loop at 30th St., then continued on Electric Ave on up the hill to a private grade. The line down on Sierra Way was also street trackage, but not connected to the Arrowhead line. I don't know how it got to Sierra Way, nor what it did once there.