For those planning summer Death Valley trips, the National Park Service visitor programs, talks, and guided walks are over for the season. They run from October through April.
If you have a large group, it may be possible to arrange for a program if staff is available. Contact Terry Baldino, Park Chief of Interpretation, at 760-786-3279 or Terry_Baldino@nps.gov.
The park visitor center is open all year, 8-5 and a video about Death Valley runs continuously until 4:00.
Scotty's Castle tours continue during the summer and the Castle visitor center is also open (this is about 3000' in elevation, nice if you'd like be a break from the hot valley floor).
Furnace Creek Inn is closed from after Mother's Day to early October, but Furnace Creek Ranch and Stove Pipe Wells (Xanterra Corp. park resorts) and the independent Panamint Springs Resort are open. FCR, SPW, and PSR have restaurants and gas stations (SPW typically costs the least), and snacks at the Castle.