Some cave tours at Carlsbad Caverns National Park have been canceled due to a lack of staff/Rebecca Latson

Editor's note: This updates with the Sequoia and Kings Canyon visitor center hours returning to their normal hours, as has the Giant Forest museum.

If you head out into the National Park System, you might find visitor impacts, both related and unrelated to the Trump administration's efforts to downsize the National Park Service. For instance:

• Six of Great Smoky Mountains National Park's 10 campgrounds will not open on April 18 as scheduled due to a mix of road work, storm damage, and staff shortages tied to late hiring of seasonal workers.
• Arches National Park in Utah also is short of seasonal staff, and until further notice no ranger-led tours nor self-guided permits for the Fiery Furnace will be conducted or issued. The park also has removed some trash cans and picnic tables to reduce maintenance workloads.
• The South Rim Campground at Black Canyon of the Gunnison National Park in Colorado is closed. It normally is open year-round.
• Florissant Fossil Beds National Monument in Colorado is closed Mondays and Tuesdays due to a lack of staff.
• At Great Basin National Park in Nevada, tours of Lehman Caves will be offered as staffing permits, on a walk-up basis. Inquire about daily availability at the Lehman Caves Visitor Center.
• The John Muir National Historic Site in California is closed on Sundays and Mondays. The site is open Tuesday through Saturday from 10 a.m. to 5 p.m.
• At Johnstown Flood National Memorial in Pennsylvania, the visitor center is closed on Wednesdays and Thursdays and open Fridays through Tuesdays from 9 a.m. to 5 p.m.
• At Pecos National Historical Park in New Mexico, you're advised to contact the visitor center at 505-757-7241 to confirm tour and ranger-led program availability.
• At Saguaro National Park in Arizona, visitor centers in both districts have returned ti their normal hours, 8 a.m.-4 p.m. in the East (Rincon Mountain) District and 9 a.m. - 5 p.m. in the West (Red Hills) District.
• At Sequoia and Kings Canyon National Parks in California, returned to their regular hours, 9 a.m.-4:30 p.m., on March 29, although the Kings Canyon Visitor Center will be closed on Tuesdays. The Giant Forest Museum also has returned to being open seven days a week from 9:30 a.m. - 4 p.m.; Kings Canyon Visitor Center is open Thursday through Sunday from 9:30 a.m. - 4 p.m.; and all ranger programs have been canceled.
• At Stones River National Battlefield in Tennessee, the visitor center will open at 11 a.m. on Sundays and be closed on Tuesdays and Wednesdays.
• You can follow progress at repairing stretches of the Blue Ridge Parkway in North Carolina on this Park Service site.
• Pinnacles National Park in California has cancelled all of its summer ranger programs.
• At Carlsbad Caverns National Park in New Mexico, lack of staff has resulted in the cancellation of three out of four cave tours: Lower Cave, King's Palace, and Slaughter Canyon. You'll only see this information on the recreation.gov site. If you go into the park website, all you will see is information about the self-guided tour into the cavern. They have totally removed information about any of the other tours that used to be offered. Also, the earliest tour time for the self-guided tour now starts at 9:30 a.m. (used to be 8:30 a.m.), and the visitor center now opens at 9 a.m. instead of 8 a.m.
• At Little Bighorn Battlefield National Monument, beginning April 28 the park will be closed Mondays through Thursdays through the summer due to construction of a new visitor center.
• The Denali Education Center has had to cancel its Denali Discovery Camp and Denali Backcountry Adventures this summer due to NPS staffing shortages.

This list was compiled from information on the National Park Service's Active Alerts In Parks website and from individual park websites. As always, check with the park you plan to visit before traveling there to see what is open or closed.