Brandon Ransom, Denver Water’s recreation manager, said the combination of low water temperatures and thin air makes it dangerous for folks to swim. He also said search and rescue efforts would be difficult since it is such a large body of water.
“We get a lot of folks from all over the country, all over the world really, that may not be accustomed to that elevation,” Ransom said. “And you can combine the elevation with the thin air and cold water, and you can have a real situation if you really get into that.”