Its the one you remember. Built like a World War II era hanger, and with all the charm of same, it is still used even though there are newer, bigger, and nicer places. The annual stock show is the big event there.
I remember watching the Denver Rockets (not the Nuggets) of the ABA and the Denver Spurs of the Western Hockey League at the Coliseum back in the late 60s, early 70s as a boy. I still have a puck that flew into the sparse crowd.