Cal Poly SLO; University of Nevada (Reno); Southern Oregon; Portland State/Reed/Lewis & Clark; CS Monterey; CS San Marcos; Boise State; NAU (the latter can get a bit cold and snowy, but it's mountain cold and not Midwestern 'cold breeze from Canada' cold)
unr is across the street from peavine mountain which has 90 miles of singletrack. but january and february are out. to much mud and snow.
Cal Poly SLO; University of Nevada (Reno); Southern Oregon; Portland State/Reed/Lewis & Clark; CS Monterey; CS San Marcos; Boise State; NAU (the latter can get a bit cold and snowy, but it's mountain cold and not Midwestern 'cold breeze from Canada' cold)
This is a good list for the west coast to be sure. I'll add my alma matter, Utah State. Fantastically beautiful runs up Logan Canyon available right from the locker room in the PE building. It gets cold in the winter, but, there were only a couple of days up there when I didn't feel I could run.
CS Monterey Bay is on the old Fort Ord Army base. I spend many a weekend there as a member of the US Army Reserve. There are literally hundreds of miles of trails available, maybe eventually, they'll finish finding any unexploded ordinance and the whole thing will be open for running, biking, hiking.
Stanford is ideal for hard training. Lots of flat dirt roads/levees out along the bay. Good loops on campus. Single track and hills available just off campus up Page Mill road. Great weather year round.
If you’re looking for something cheap with great trails check out University of Wyoming. Cold and snowy in winter, but you could Xc ski to cross train. Laramie sits at 7200ft with tons of trails in town, drive 15 minutes up to 8600ft and you have basically unlimited single track trails and dirt roads. It was 17k a year out of state when I went awhile back. Probably less than 20k for out of state now