Hiking and jogging

Hiking and Jogging are unlockable interactions when a Sim gains enthusiasm in the Nature and Fitness hobbies, respectively.

A Sim can "Go Hiking" or "Go Jogging" by clicking on themselves. The Sim can ask others to go with him and then leave the lot for about one sim-hour.

Hiking
Hiking is unlocked through the hobby "Nature". Sims who have a high hobby level in nature will want to Go Hiking.

On a Hike, a number of things can happen that range from finding a nice bit of something, to getting a bug to put in that Sim's collection, meeting a new Sim or pet, getting infected by poison ivy, up to being attacked by bees.

Jogging
Jogging is unlocked by having enough enthusiasm in the Fitness hobby. Jogging can be done with other Sims or you could direct your Sims to do it alone. Sims can get sunburned when they go jogging and it's very hot.

Jogging is also an Athletic ability in The Sims 3.