• View of Grand Canyon National Park at sunset from the South Rim

    Grand Canyon

    National Park Arizona

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  • Through Saturday: Scattered Showers and Thunderstorms. Sunday: Thunderstorms More Likely

    Monsoonal weather patterns have moved into the Grand Canyon area decreasing fire danger. As a result, on Tuesday, July 8 at 8 a.m. fire managers lifted fire restrictions within Grand Canyon National Park. More »

  • Temporary North Rim Road Closures Due to Galahad Fire Began May 29

    As of Thursday May 29, two road closures are in effect for public and firefighter safety. W4 road is closed from FS268B road south to Pont Sublime. W1 road is closed from W4 to western end of the Basin. More »

New Zealand Mudsnail

New Zealand Mudsnail shell, Florida Caribbean Science Center

New Zealand Mudsnail

FL Caribbean Science Center

The New Zealand mudsnail, Potamopyrgus antipodarum was first discovered in the Snake River, Idaho in the 1980's. It is now rapidly spreading throughout the western US and has become established in rivers in seven western states and three national parks. It was discovered in the tailwaters below Glen Canyon Dam in March 2002. Subsequent searches in Grand Canyon found it distributed more than 225 miles downstream from the dam, so it was likely introduced several years earlier. Mudsnail populations often reaches densities greater than 100,000 per square meter in suitable habitat, and the species is associated with alterations in primary production and decreases in native invertebrate populations in rivers that it has invaded. Biologists are concerned about potential impacts it may have on native species, fisheries, and aquatic ecosystems in the western US.

Did You Know?

WHITEWATER RAFTING

There are different river trip opportunities through Grand Canyon National Park, including professionally guided raft trips, available to the public and often reserved a year or two in advance; and self-guided, or "private" river trips, made available to the public through a weighted lottery. More...