A small meandering creek in the lower sections is much like Illinois river and Michigan rivers and is one of the major tributaries that begins the North Platte in Walden/North Park Area.  Mostly browns and brook trout in the upper reaches, the single access point is right before you get to the Delaney Buttes Lakes.  Manville SWA is accessible and has as many mosquitos as it does fish.  It is a good place to beat the crowds and find some eager browns.  The upper reaches are fishable as you get into national forest but require hiking to get in.