Given how cheap land is in the far north part of California, I've always wondered why there isn't a city built specifically for walking and bicycling up north o

Given how cheap land is in the far north part of California, I've always wondered why there isn't a city built specifically for walking and bicycling up north of Sacramento. Seems like with everyone telecommuting, if you build a community with a good school and with walkability and bikeablity, you could probably attract some families from the Bay, where prices are so high that people are looking for alternatives that are within 2 - 3 hours drive of the Bay Area.