Traveling from Washington DC to Vancouver with an hour layover in Denver.... can I go from one gate to another without having to go through security again? I'm just trying to figure out if I can make my next flight in time! Thanks!

Check with airline.

Should be all in one terminal but check with airlines

I would confirm with your associated airlines to be sure but you should not have to fully exit terminal past security. All gates are connected via rail

Yes, you may havr to take the train to switch terminals but dont have to go through security again, train takes probably 5 minutes