@ascentale@sam A7. When I was in college in Tucson, AZ, they had The Loop, which was a very long trail that looped around Tucson. When I was there, it was still incomplete, just the section near me was good for about 30-40 mile (including to/from the trail) rides on paved mixed use paths. That’s my favorite trail to this day, because once I got on the loop, I didn’t have to worry about cars at all.
I’m also partial to the SF Bay Trail, which is trending in this same direction.