YELLOWSTONE NATIONAL PARK, WYOMING - MAY 22: Visitors in vehicles are caught in a "bear jam" as traffic backs up while people attempt to view a grizzly bear nearby ahead of the Labor Day weekend on May 22, 2026 in Yellowstone National Park, Wyoming. Yellowstone National Park became the nation’s first national park on March 1, 1872, when President Ulysses S. Grant signed a congressional act protecting the land “for the benefit and enjoyment of the people.” Today, the 2.2-million-acre park thrives as part of one of Earth's last nearly intact large temperate ecosystems, famously preserving over 10,000 hydrothermal features and around 500 geysers—roughly 50 percent of the world’s total. Boasting the largest concentration of mammals in the lower 48 states, Yellowstone stands as the only place in the U.S. where bison have roamed continuously since prehistoric times. Native American communities inhabited and conserved the lands for over 10,000 years, with 27 individual tribes recognized by the National Park Service as carrying modern-day and historic ties to Yellowstone. National Park Week will celebrate America’s 250th anniversary with a weeklong celebration in August featuring hundreds of commemorative events at many of America’s 433 national parks under the theme “Celebrate America’s Story”. (Photo by Mario Tama/Getty Images)

YELLOWSTONE NATIONAL PARK, WYOMING - MAY 22: Visitors in vehicles are caught in a "bear jam" as traffic backs up while people attempt to view a grizzly bear nearby ahead of the Labor Day weekend on May 22, 2026 in Yellowstone National Park, Wyoming. Yellowstone National Park became the nation’s first national park on March 1, 1872, when President Ulysses S. Grant signed a congressional act protecting the land “for the benefit and enjoyment of the people.” Today, the 2.2-million-acre park thrives as part of one of Earth's last nearly intact large temperate ecosystems, famously preserving over 10,000 hydrothermal features and around 500 geysers—roughly 50 percent of the world’s total. Boasting the largest concentration of mammals in the lower 48 states, Yellowstone stands as the only place in the U.S. where bison have roamed continuously since prehistoric times. Native American communities inhabited and conserved the lands for over 10,000 years, with 27 individual tribes recognized by the National Park Service as carrying modern-day and historic ties to Yellowstone. National Park Week will celebrate America’s 250th anniversary with a weeklong celebration in August featuring hundreds of commemorative events at many of America’s 433 national parks under the theme “Celebrate America’s Story”. (Photo by Mario Tama/Getty Images)

YELLOWSTONE NATIONAL PARK, WYOMING - MAY 22: A black bear crosses a roadway as visitors in cars look on ahead of the Labor Day weekend on May 22, 2026 in Yellowstone National Park, Wyoming. Yellowstone National Park became the nation’s first national park on March 1, 1872, when President Ulysses S. Grant signed a congressional act protecting the land “for the benefit and enjoyment of the people.” Today, the 2.2-million-acre park thrives as part of one of Earth's last nearly intact large temperate ecosystems, famously preserving over 10,000 hydrothermal features and around 500 geysers—roughly 50 percent of the world’s total. Boasting the largest concentration of mammals in the lower 48 states, Yellowstone stands as the only place in the U.S. where bison have roamed continuously since prehistoric times. Native American communities inhabited and conserved the lands for over 10,000 years, with 27 individual tribes recognized by the National Park Service as carrying modern-day and historic ties to Yellowstone. National Park Week will celebrate America’s 250th anniversary with a weeklong celebration in August featuring hundreds of commemorative events at many of America’s 433 national parks under the theme “Celebrate America’s Story”. (Photo by Mario Tama/Getty Images)

YELLOWSTONE NATIONAL PARK, WYOMING - MAY 22: A visitor with his dog watches the Castle Geyser erupt in Upper Geyser Basin on May 22, 2026 in Yellowstone National Park, Wyoming. Yellowstone National Park became the nation’s first national park on March 1, 1872, when President Ulysses S. Grant signed a congressional act protecting the land “for the benefit and enjoyment of the people.” Today, the 2.2-million-acre park thrives as part of one of Earth's last nearly intact large temperate ecosystems, famously preserving over 10,000 hydrothermal features and around 500 geysers—roughly 50 percent of the world’s total. Boasting the largest concentration of mammals in the lower 48 states, Yellowstone stands as the only place in the U.S. where bison have roamed continuously since prehistoric times. Native American communities inhabited and conserved the lands for over 10,000 years, with 27 individual tribes recognized by the National Park Service as carrying modern-day and historic ties to Yellowstone. National Park Week will celebrate America’s 250th anniversary with a weeklong celebration in August featuring hundreds of commemorative events at many of America’s 433 national parks under the theme “Celebrate America’s Story”. (Photo by Mario Tama/Getty Images) ***BESTPIX***

SEATTLE, WASHINGTON - MAY 22: MacKenzie Holmes #54 and Jade Melbourne #5 of the Seattle Storm rebound against Diamond Miller #1 of the Connecticut Sun at Climate Pledge Arena on May 22, 2026 in Seattle, Washington. (Photo by Steph Chambers/Getty Images)

SAN FRANCISCO, CALIFORNIA - MAY 22: Manager Will Venable #1 of the Chicago White Sox takes pitcher Davis Martin #65 out of the game against the San Francisco Giants in the bottom of the six inning at Oracle Park on May 22, 2026 in San Francisco, California. (Photo by Thearon W. Henderson/Getty Images)

SAN FRANCISCO, CALIFORNIA - MAY 22: Luis Arraez #1 of the San Francisco Giants hits an RBI single to score Drew Gilbert #0 against the Chicago White Sox in the bottom of the fifth inning at Oracle Park on May 22, 2026 in San Francisco, California. (Photo by Thearon W. Henderson/Getty Images)

SAN FRANCISCO, CALIFORNIA - MAY 22: Munetaka Murakami #5 of the Chicago White Sox is congratulated by manager Will Venable #1 after scoring against the San Francisco Giants in the top of the fourth inning at Oracle Park on May 22, 2026 in San Francisco, California. (Photo by Thearon W. Henderson/Getty Images)