This is for ascent of Pikes Peak from the Barr Trailhead in winter, roughly following the route of the Barr Trail.  Steve Bremner has outlined standard "winter rules" for this route: 

Following "Winter Rules," because in winter it is actually not safe or even possible to adhere to the trail proper, anything goes above A-Frame.

Note that the Barr Trail is (roughly) the route of the Pike Peak Marathon, with ascent and round-trip records for summer conditions recorded on the PPM website.

https://www.runnersworld.com/trail-running/of-glaciers-and-grizzlies

30 miles: The Mad Dash - Logan Pass to Goat Haunt
Elevation Drop: 2,740 > Elevation Gain: 5,090 > Time Estimate: 6–8 hours

Traditionally called The Mad Dash, this run between Logan Pass and Goat Haunt demands a time schedule. Unless you want to add on another nine miles to run around Canada’s Waterton Lake, you’ll need to hop a tour boat to cross the lake over the international border.