City Manager’s Rule now permits slacklining in designated locations

Slacklining is defined as a recreational activity or sport that involves participants balancing on a strip of webbing that is fixed above the ground between two trees. This Rule is intended to allow for beginner and general recreational slackline users. This does not accommodate potential needs of extreme or elite slackline users.

Slacklining must comply with all rules approved by the city manager’s rule.

Summary of Rules:

  • Slacklining is only allowed on designated trees. Please see the interactive map below to identify the approved trees.
  • Slacklining is only permitted during park hours.
  • Participants and spectators assume all risk associated with the activity.
  • All slacklines may be affixed on a temporary basis and may not be left unattended. Unattended equipment will be removed and considered abandoned property.
  • Tree protection material must be placed between the tree and the line that is fixed to the tree. Material must be at least ¼” inch thick and at no time should any cabling, wires or lines be in direct contact with the bark of the tree.
  • The slackline may not be elevated to a height of more than four feet at the center of the span when the user is on the line and weighting it.
  • The slackline may not obstruct the intended uses of the park, sidewalks, buildings, roads, streets, playgrounds, bikeways, water features, sport courts, bike racks, handrails, art objects, fences or light poles.
  • When the slackline length exceeds 50 feet, visible safety tags or flags must be used to alert park users that the line is in place.
  • Trees and/or landscaped areas showing damage from slacklining activities may be restricted.
  • Slacklines may only be attached to approved trees and may not be affixed to any other infrastructure including but not limited to buildings, bike racks, handrails, art objects, fences or light poles.
  • Activities such as stunts or tricks involving flips are not permitted.
  • Slacklines must be removed for any park permit use or regular maintenance such as lawn mowing or tree pruning.

Slacklining Map

Interactive map to locate designated trees for slacklining

Explore the map to learn where Slacklining is allowed in Boulder, zoom in to view specific trees that may be used in each park.

View map in full screen.