Well, just to pay Devil's Advocate, there is a campground nearby and in these days of CoVid, there are many more people living along roads and in campgrounds. Further, there have been other assaults and trouble west of Colorado Springs. Some of it was specifically against bicyclists (someone posted the Outdoor magazine article on it, I'll link it below).
At the edges of wilderness recreation areas, we often see trouble. The tendency for certain ne'er-do-wells to congregate outside of places like Yosemite and other wide open spaces is something documented in a series of books and articles.
Search Results
For a sample of murders near open spaces, spaces where the outdoor crowd goes.
But this is the one that comes to mind, as it isn't too far from Salida and involves some anti-biking whacko:
Murder on a Mountain Bike
It took a year to find this murdered man's body:
Chad Austin: Missing hiker’s remains found in Virginia woods. Police say he was likely killed.