Glacier and Yellowstone national parks are two of 20 national parks nominated for a Readers’ Choice Award sponsored by 10Best, a division of USA Today Travel.

The parks are competing for the title of best national park. Voting is open to the public, and readers may vote once every day. To vote, visit www.10best.com/awards/travel/best-national-park. Polls close at 11:59 a.m. on Monday, July 14.

David and Kay Scott, who chose the 20 nominees, have been regularly exploring the National Park System since 1969 and are the authors of books about America’s greatest recreational spaces. The rest of the nominees include:

• Acadia National Park

• Big Bend National Park

• Blue Ridge Parkway

• Bryce Canyon National Park

• Crater Lake National Park

• Death Valley National Park

• Everglades National Park

• Glacier Bay National Park

• Grand Canyon National Park

• Grand Teton National Park

• Lassen Volcanic National Park

• North Cascades National Park

• Olympic National Park

• Sequoia and Kings Canyon National Parks

• Shenandoah National Park

• Theodore Roosevelt National Park

• Yosemite National Park

• Zion National Park