The U.S. National Park Service is among agencies hit by the federal sequestration.

The across-the-board budget cuts are clipping national park funding, and Saguaro National Park is no exception.

Saguaro Park Superintendent Darla Sidles says some of the effects are already being felt in travel funding to attend conferences and money for training.

"There's also some real key positions in the park that we're not able to fill," Sidles says. "One of those would be the district ranger for the east side, the Rincon Mountain District."

The park remains open, and there are still plenty of options for visitors.

"So every day, there's something different to do out there," says Andy Fisher, the chief of park interpretation.

Programs include hiking, presentations from naturalists and educational lectures.

Sidles says the park operates on an annual budget of about $3.6 million. It is divided into two units: the Rincon Mountain District east of Tucson and the Tucson Mountain District west of the city.