Carlsbad Caverns National Park is open every day of the year except for December 25.
EXPANDED (SUMMER) HOURS: Memorial Day weekend through Labor Day, 8 a.m. to 7 p.m. Tours are available 8:30 a.m. to 5 p.m. Last entry into cave via natural entrance is 3:30. Last Entry into cave via elevator is 5:00.
REGULAR HOURS: After Labor Day until Memorial Day weekend, 8 a.m. to 5 p.m. Tours are available 8:30 a.m. to 3:30 p.m. Last entry into cave via natural entrance is 2:00. Last entry into cave via elevator is 3:30.
Please note: Beginning on the second Sunday in March, Carlsbad Caverns National Park is on Mountain Daylight Saving Time; Mountain Standard Time begins on the first Sunday in November.