Welcome to the forum!
Im out here in Pueblo which is not too far from you. However, you're only going to find baculites, other types of ammonites, Inoceramus shell fossils and petrified wood in this area plus out there in Fowler. It just gets dustier out your way.
Click to view attachmentYou can walk the Arkansas River (which runs past Fowler under the 167 bridge)
Click to view attachmentuntil the confluence with Fountain Creek in Pueblo and then head North.
Most of the water is really low right now. I don't know over the past 2 weeks however as I haven't been out since. Both waterways are low enough you can zigzag back and forth in shorts and only get the bottom wet but now it is cold as hell and I would only wear waders. You can find along this route lots of petrified wood; so much of it that you can take a 50 gallon trashcan and fill it up in an 8 hour day. I have found logs larger than 6 feet in length but I had no possible way of extracting it and when I went back the next time it was gone. (Bring a sledge to at least get a chunk if you can.)
Between Fowler and Pueblo I would imagine there would be increasingly less and less stuff to find. When you travel from the confluence Northwards, you find increasing amounts of goodies. I have a few pieces of polished, tumbled Smoky Quartz and Amazonite that I have found on the Fountain Creek exclusively under this bridge near Wal-Mart:
Click to view attachmentRight now they are doing some kind of sewer line work down that direction and are digging up a portion of the Fountain Creek South of that bridge. This is digging up goodies! It's a short jaunt but is worth it on these cold snowy days. It is effortless to walk the bank and not get wet, too.
Onward West toward Fremont -- you can go Northward toward Cripple Creek mining district on Phantom Canyon Road but after a recent flood there was a washout in the road there. You can get around it but there is a feeble attempt to block the road. Canon City -- when you get past the big turn after the Historic Prison on the Western side of Skyline Drive it starts to get mineralized. As you go outward past the Gold Mine Rock Shop:
Click to view attachmentClick to view attachmentClick to view attachmentThere is some information for you, just a little bit!