DaisyRyder said:Maybe t. vvedenski tulip.
Was this tulip in a garden or in the wilderness?
Vvedensky's Tulip is a rarely seen wild tulip species from Central Asia so I would not expect to see it in Colorado growng wild.
Tulipa gesneriana was introduced to USA and can apparently be found growing wild in some areas.
The species is widely believed to have originated in Turkey.
https://en.wikipedia.org/wiki/...
However I an not expert enought to say which Tulip is in your pic.
There are approximately 5000 different tulips listed in the International Register, published by the Royal General Bulb Growers Association in the Netherlands, with nearly all of them hybrid tulips.