Arrive in Denver, Colorado, the "Mile High City." Pick up your rental car and stock up on supplies for your national park adventure. Embark on a scenic drive towards Rocky Mountain National Park (approx. 1.5 hours). Explore the park's breathtaking scenery on a short evening hike. Bear Lake Loop or Emerald Lake Trail offer stunning views and a taste of the park's beauty.

Hike Trail Ridge Road, the highest continuous paved highway in North America, offering panoramic vistas and diverse alpine ecosystems. This route may require acclimatization for those coming from lower altitudes. Pack a picnic lunch and enjoy it at a scenic spot like Sprague Lake or Moraine Park. Explore the park's diverse wildlife. Take a ranger-led program or embark on a self-guided wildlife viewing tour to spot elk, bighorn sheep, and marmots.

Take a scenic drive from Rocky Mountain National Park to Yellowstone National Park (approx. 5 hours), stopping at points of interest along the way, such as Steamboat Springs, a geothermal wonderland. Explore the geothermal wonders of Yellowstone. Visit Old Faithful, the most famous geyser, and witness its awe-inspiring eruptions. Afterwards, stroll along the boardwalks at Lower Geyser Basin, marveling at colorful hot springs and mudpots.

Embark on a hike to the breathtaking Upper and Lower Yellowstone Falls, the grand canyons of the park. Witness the power and majesty of these cascading waterfalls. Pack a picnic lunch and enjoy it at a scenic spot like Grand Prismatic Spring, the largest hot spring in the United States, known for its vibrant colors. Take a wildlife viewing tour in the park's vast landscape. Spot bison, elk, wolves, and grizzly bears in their natural habitat.

Take a scenic drive from Yellowstone National Park to Zion National Park, Utah (approx. 8-10 hours), with a stop for lunch on the way. This is a long drive, so consider breaking it up with a stop overnight at a halfway point, such as Salt Lake City, Utah, for a more relaxed journey. Enjoy a relaxing dinner in Springdale, savoring local cuisine with a view of the red rock cliffs.

Embark on a hike through the heart of Zion Canyon. For a more adventurous option, consider the Pa'rus Trail, leading to the Emerald Pools, a series of cascading waterfalls. Explore the Zion-Mount Carmel Highway, a scenic drive offering panoramic vistas of the park's red rock formations. Hike the Canyon Overlook Trail for stunning views, or for a more challenging option, consider the Canyon Rim Trail for a bird's-eye view of the vast canyon landscape.