Josh Wharton is an elite alpinist from Rifle, Colorado who has done big, bad ascents all over the globe. In 2011 he finally turned his attention to the Canadian Rockies, not expecting very much. He got a good taste of how badass / good they are and came back in 2012 for some serious climbs. Click here for an interesting perspective from a real climber on our back yard mountains.
As I mentioned in the sidebar on my Little Alberta trip report, John Walsh and Josh Wharton also completed a second ascent of the humbling North Pillar route on the north face of Twin's Tower (VI 5.10d A2 by Blanchard and Cheesmond in 1984) in September 2013. Read more about this ascent here.