When it comes to adventurous living, Denver ranks as one of the most outdoorsy cities in the United States. Whether it’s hiking up mountains or skating down the winding mountain-roads in nearby Boulder, Denver is a great place to be outdoors and enjoy that adrenalin rush. So naturally, if you have a long stopover in Denver, or quite a bit of time on your hands before that big conference, you’ll need to find Denver luggage storage so you can make the best of it.
Wilderness Exchange is within walking distance of Union and they require you leave a bag with them when you go into the store, they may be willing to stash your bag for a few hours. No guarantee on that, but an option if you can't find anything else. They are only open 10am-6pm on Sundays, so you may have to wait around a bit or pick it up early depending on when you get there and will be leaving.