Slacklining is a sport created by rock climbers and boulderers to build muscle control and balance. It is similar to tight rope walking, but instead of rope, 1" webbing is used. The webbing is flat so a slackliner's foot doesn't roll off it. The rope is somewhat dynamic so it stretches when one stands on it. It is generally set a few feet off the ground, between trees less than 30 feet apart, but some are longer. Slacklines higher than 20 feet above the ground are called highlines. Some have been set up thousands of feet in the air.
Some students set them up in the Quad or on fields around campus. If you have a question or want to try it out, just ask! Climbers, boulderers, and slackliners are friendly by nature! It's pretty easy to learn, but hard to get good at it. Keep practicing!
Going to UCD next year, own a slackline (and other necessary gear) but never got good at it due to a lack of places to set up, eventually forgot how to do so. If I bring my gear, where can I relearn how to set up my line? — AdriannaA
Visit Outdoor Adventures anytime during business hours. There's almost always a slackline set up out front during good weather. The folks there would be more than happy to give you all the help you'd want. — ARWENNHOLD