Go look at a map of Tucson. Look at where the Titan II missile museum is, then look where Biosphere 2 is. Now tell me how much it would cost to build public transit between those two locations, and how many people would take it.
Trailheads are fundamentally incompatible with transit. They might be philosophical opposites. A trailhead accessible by rail is a trailhead I don't want to be at.
Not everywhere in the world is exactly the same. Stop trying to force a top-down solution that works in Europe on a geographically massive city like Tucson
Totally wrong. Transit != rail. There are amazing trailheads that are easily accessible from downtown Seoul by a reasonably short busride (e.g. Bukhansan national park). The fact that buses run to these trailheads does absolutely nothing to diminish them. In fact, they enhance them, because they make it possible to through-hike! Eat your heart out, personal automobile.
Generally cars are going to be faster (it's point-to-point with no stops to let people on/off), or equivalently, they have greater range for the same time. If your goal is to physically remove yourself from downtown, they let you go a bit further. Also you don't have to deal with someone leaving their mac-and-cheese meal to stink up the bus. Getting away from such unpleasantries is kind of the point.
Once you take in to account traffic, transit can definitely be faster than cars. A subway that bypasses traffic entirely, or even a bus using HOV lanes, can easily outpace a car, especially if it's an express bus (fewer stops) and services are centrally located.
I've worked at places where it could take 20 minutes to get out of the parking garage when a bus stop was less than a 5 minute walk, on-boarding/off-boarding was super fast (a pre-pay kiosk meant people didn't stop to pay when they got on), and I could be all the way home in less than 20 minutes.
Trailheads are fundamentally incompatible with transit. They might be philosophical opposites. A trailhead accessible by rail is a trailhead I don't want to be at.
Not everywhere in the world is exactly the same. Stop trying to force a top-down solution that works in Europe on a geographically massive city like Tucson