Local activities:

Skanderborg activity calendar (only in Danish)
Visit Skanderborg

Fun for the whole family
Labyrinthia
The Freshwater Museum
Canoe holidays (only in Danish)
"gi den gas" palads - Family Edutainment Centre
(only in Danish)

Fishing
Laven Fishing Lake

Hiking
BestigBjerge.dk (only in Danish)

Golf
Skanderborg Golf Club (only in Danish)
Himmelbjerg Golf Club

 

Activities that can be reached in under an hour:

Legoland
Givskud Zoo
Ree Park
Randers Tropical Zoo
Djurs Sommerland