President Roosevelt came as a giant stone arch was under construction and workers helped the President set the cornerstone for the arch. Called the Roosevelt Arch from that point on, the top curve of the arch contains eight words from the original decree that established the park. Expect highs in the 70s or low 80s in midsummer. Once the sun goes down, a sweater will keep you warm as the temperature drops. It's common for the higher elevations to get snow late in the spring or early fall.
Thunderstorms make regular visits to the park.
The best way to enjoy the park is to be prepared for change. Bring layers of clothing to keep you warm when the temperatures dip. Rain gear should be included on your packing list. During the summer, make sure to bring sunscreen, sunglasses and a hat. Make sure to drink water and stay hydrated when you're out hiking and exploring.