Glacier National Park’s free, optional shuttle bus system that provides shuttle services along the Going-to-the-Sun Road starts today (July 1) and runs through Sept. 7.

On the west side of the park, shuttle services begin at the Apgar Visitor Center. Service to all west side shuttle stop locations generally begins at 9 a.m. with shuttles departing every 15-30 minutes until 7 p.m., when the last shuttle leaves Logan Pass.

Prior to 9 a.m. there is limited service to some spots on the west side.

• At 7 a.m. and 7:18 a.m. there are express trips from the Apgar Visitor Center straight to Logan Pass, without any intermediate stops, and then continuing on to St. Mary making all regularly scheduled stops.

• At 7:36 a.m. an express shuttle departs the Apgar Visitor Center straight to Logan Pass, where a connection can be made to the St. Mary shuttle.

• At 7:56 a.m. shuttles begin service about every 15-30 minutes from the Apgar Visitor Center, with stops at Avalanche Creek, The Loop, and Logan Pass. This shuttle will not stop at Apgar Village, Apgar Campground, Sprague Creek, or Lake McDonald Lodge.

The St. Mary Visitor Center is the transit hub for shuttle services on the east side of the park. East side shuttles begin service at 7 a.m. from the visitor center and depart every 40 to 60 minutes. The last shuttles of the day leave Logan Pass for the Apgar Transit Center and St. Mary Visitor Center at 7 p.m. For more information on the shuttle system, visit http://www.nps.gov/glac/planyourvisit/shuttles.htm.

For the majority of the summer season, travelers should expect construction activities between Siyeh Bend and St. Mary on the Going-to-the-Sun Road on the east side of the park. The majority of the work involves paving the 15-mile segment from Siyeh Bend to St. Mary. Many points of interest on the east side will be difficult to access by private vehicle during construction operations. Shuttle access is recommended for all access points and trailheads along the east side of the Going-to-the-Sun Road.

There will be no construction work or delays due to roadwork over the July 4 weekend, Friday through Monday on the east side of the Going-to-the-Sun Road. Following the holiday weekend, road construction will resume seven days a week. Delays will be up to 30 minutes.