Yup, out the "door", down the "hall" and up the "stairs" into the main B concourse, way down at the end. You'll have more trouble with a delay than navigating the concourse, even if your cx is at the other end. Even with my MIL in tow, we walked to the high 30's gates in 15 minutes from UX.

I've been arriving at B concourse on UX as long as I can remember, but didn't know if that was coincidence or not. Don't believe I've ever taken the train at DEN.

Pat