U.S. national parks launch 11 search-and-rescue operations on an average day, according to a study.
Travis Heggie, an assistant professor at the University of North Dakota who headed the study, analyzed search-and-rescue reports from 1992 to 2007 and found there were more than 65,000 operations in national parks at a cost of more than $58 million.
Those most commonly in need of help? Day hikers, young men and boaters. Weekends were the busiest.
The results are similar to an earlier analysis by Heggie of national parks in Utah, which found young men on day hikes were among the most likely to need a rescue.