The history of the resort turned zip line adventure can be found here.
http://soaringcolorado.com/about/]Soaring[/url]
It is not inexpensive but the experience is (not to sound corny) priceless. They treat you like gold, the lunch next to the river is delicious, they remember everyone's name, tipping is not allowed, you learn about the local environment and how the old-growth Ponderosa Pines support the tree stands without any damage, and their patented zip line self braking system. I highly recommend it!