Nick Clark posted the route:

The trailhead for Round is 7 or 8 miles (maybe more) west of Loveland on Hwy 34. Two or 3 miles west of the Big Thompson Narrows, there is a pull-off to the left. This leads to the parking lot for Round. Route goes from trail map to big cairn at Summit: 4.8 miles & 3,000'. 95% singletrack.

Note:  The Round Mountain Trail ascends Sheep Mountain (confusing!)

Towers Road, in the Horsetooth Mtn trail system, is a well-established Fort Collins time-trial route - mainly for mountain bikers, but also for trail runners.

http://www.discoverytrail.org/