If Hiking is for you, then the Roaring Fork Valley and the Western Slope is a great place to live.
Aspen Trail Finder is a great resource for hiking in the area.
The Aspen Times did their top ten and its a mix of Aspen and Glenwood Springs trails.
ACES (Aspen Center for Environmental Studies) has their advice on hiking which is great.
The Canyon Creek area has the Storm King trail, and there are trails in South Canyon.
New Castle is not short on trails, and one of my personal favorites is Colorow Trail.
The LoVa trail system promotes trails from Glenwood to Parachute and is a great place to check out proposed trails.
Silt Island Park is one of my personal favorites.
Grand Junction is home to numerous trail systems to get out and explore.