There are no lockers, at present. If you are taking the Amtrak, you can, of course store your bags with them. If you are staying at the Crawford or he Oxford, or the Indigo, you should leave your bags with them. If you are just waiting for theA line to DIA or the Light rail, you'll have to watch you own bags, but the Main Reception Hall has plenty of couches and chairs and food and rdink and chotckes. It is good for hanging out and playing shuffleboard. Lockers Denver Colorado
There are plenty of convenient places to store your luggage in Denver, from downtown to Lincoln street to Capitol Hill and Commons park. The cost is just US$6 per day, and check in time is just 3 minutes. So basically, in the same time it took to make that instant cup of Ramen before rushing to the airport, you can be in and out the door with no luggage to weigh you down.
Clearing out a storage unit is pretty much like moving.  If you’ve ever moved from one home to another, then you can appreciate how hard this side hustle can be. You load boxes and furniture into a truck, drive it to the new destination (usually your own home), unload all of it, unpack it to find out what you’ve just bought, then sort everything into three piles: Lockers Denver Colorado

In my experience, most facilities give you 48 hours to have the unit cleared out and left in a “broom clean” condition (i.e. swept out). If you don’t get your stuff out, of if you choose to cherry pick a few items and leave the rest, then the facility can reclaim the locker and it would most likely be auctioned off again. You’d also most likely be banned from participating in future auctions held at that facility, or run by the auction house you dealt with. Lockers Denver Colorado