My sister lives and rides in Santa Fe:
”Yes, both trail systems are great and have lots of options. Ride both of them. Don’t miss ‘Hustle & Flow’ that is part of La Tierra trails. Easiest access is from the Calabasas trailhead.”
And
”If he has time he should drive to Galisteo Basin Preserve and ride the trails out there. 50 miles of trails. Three different trailheads to park and ride from. My favorite trail system about 45 minutes south of Santa Fe.”
Hope that helps.