The most visited mountain in America and second most visited mountain in the world behind Mount Fuji, Japan. Nicknamed 'Americas Mountain' and thought to be the one of a couple places that formed the inspiration behind 'America the beautiful'.
If you go:
You can get to the summit by car [Pikes peak toll road] or by rail [Pikes Peak cog railway] and enjoy the stunning panoramic views from 14,110ft ! Open year round but check conditions and status before traveling.
Links:

Pikes Peak Toll Road
Cascade, Colorado 80809 USA
Mailing address:
Manitou Springs Visitor Bureau
354 Manitou Avenue
Manitou Springs, CO 80829 USA
Phone Numbers:
Pikes Peak Information
+1 (800) 525-2250
+1 (800) 525-2250
Pikes peak Cog railway
+1 (719) 685-5401
+1 (719) 685-5401