Wiens, a 2000 inductee to the Mountain Bike Hall of Fame, won the Leadville Trail 100 every year from 2003 to 2008. In 2007, he broke the 7 hour mark for the first time at 6:58:46 while holding off Floyd Landis of Tour de France infamy by just under 2 minutes. In 2008, Wiens won again beating 7-time Tour de France winner Lance Armstrong by just under 2 minutes and setting a new course record of 6:45:45. In 2009, Wiens finished second behind Armstrong in Leadville with a time of 6:57:02. Wiens is married to Susan DeMattei, a professional mountain biker and Olympic bronze medal winner.
In 2006, Wiens founded Gunnison Trails, a non-profit organization dedicated to enhancing singletrack bike trails on public lands adjacent to Gunnison, Colorado.
He is known as the vanilla gorilla.
In June, 2012, Dave Weins became the inaugural Director of the Mountain Sports Program at WSCU (Western State Colorado University) in Gunnison.
- Hamill, Sean D. (2008-10-13). "Beating Lance Armstrong, Then Getting Back to Life". New York Times. Retrieved 2008-10-14.
- "Leadville Trail 100 Mountain Bike Past Champions". Leadville Trail 100. Retrieved 2008-10-14.[dead link]
- "Finishers Report for: LT100 Mountain Bike". Leadville Trail 100. Archived from the original on 2008-08-22. Retrieved 2008-10-14.