The difference between riding the Front Range of Colorado and Northern New Mexico......Well, on a typical ride in far-northern New Mexico you might see 2 people in 50 miles.....Colorado you might see 50 people in 2 miles. No shit chingon, that is no exaggeration.
That is certainly true on the South Boundary Trail - which is as good (or better) than anything you'll find in Colorado. So far this year I've ridden the SBT 5 times and I have seen a total 4 other riders and one group of 3 hikers.