Maps are actually a good idea for hubs where you can use them such as in pointing out where a place can be found. While it's true that readers can just go to Google maps to find a place, it would be much easier and convenient for them if they can already see a map right in your hub. That means they won't have to go elsewhere just to find a map if they're looking for one.
Also, there are many other people who might come across your hub but have no idea where the place you're talking about, like Colorado, is located so a map would definitely help them. For instance, they could be from other countries or they're visiting Colorado for the first time, etc. In this case, a map would be of much use to them. So maps can actually be necessary in hubs that talk about places.
I looked at your hub and I didn't think the maps were unnecessary. They are, after all, helping the readers by telling them where the places are so if they want to go there, they can refer to the map.