ALMO — Winter’s grasp is still holding firm on the large rock outcroppings, spires and monoliths of Castle Rocks State Park and City of Rocks National Reserve. The trails are buried in deep snow and the rocks frozen with icicles — the start of the climbing season is still weeks out.
As spring approaches and the snow melts, however, climbers can rejoice a little more and add another activity to their climbing quiver when highlining returns.
https://magicvalley.com/outdoors/highlining-coming-back-to-city-of-rocks-and-castle-rocks/article_6742abaf-0076-5518-9ec0-e98ee83ecba5.html