Despite my limited experience, I believe these to be among the best nine miles that cycling has to offer:
Late April might be the best time to visit Tucson.
My friend John, under blooming Palo Verdes at a Rillito bike path rest stop in Tucson, Arizona on the first day of May
No coastline, but lots of bike lanes and paths. I try to go twice a year (Lived there in the '70s).