YELLOWSTONE NATIONAL PARK, Wyo. (AP) — The Mount Washburn trail and trailhead parking area at Dunraven Pass in Yellowstone National Park will be closed in August as work continues to improve the trail.

The popular hiking trail is located north of Canyon Junction and is being improved for public safety reasons.

The National Park Service says the closure will occur Aug. 6-27 and a helicopter will be used to deliver materials to the work site.

The agency has been working recently on various improvements to the area, including new windows and concrete preservation work at the lookout.

The Mount Washburn Trail from Chittenden Road will remain open during the work.