Tire yourself out with canyoning or horse riding
If you're feeling adventurous, head for Nae Limits, which is a 45-minute drive from Gleneagles. The company offers activities on land and in water, such as whitewater rafting, canyoning, adventure tubing and sphereing.
Equally active, the Blair Castle trekking centre is set in the castle's grounds, next to the deer park. The centre opened in the 1950s to provide summer work for the ponies used to carry stags and grouse in the sporting season. It's approved by the Trekking and Riding Society of Scotland (TRSS).