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. Denver Lockers
Rebecca, I remember a previous post that a visitor found storage at the bus station, so I called to see if still available, and it is. Lockers are $3 for the first hour and $1 per hour after that. It's difficult to find storage short term because of security/liability, esp. since 9/11. If you are staying at a hotel, they will often keep your luggage for you short term.
By all accounts, the shopping scene in Denver is excellent! If you want to shop during your time here, we highly recommend the 16th Street Mall. It’s packed with stores, boutiques, shops, and eateries, from department stores like JC Penny to specialties like American Girl and beyond. Wrap up your visit with a trip to the Cheesecake Factory or one of the other excellent food places on mall property. Lockers Denver Colorado