We went to Wyoming, Colorado, Utah, and Idaho, to visit the national parks and monuments.
Trip outline:
Einat and Yossi: Denver → Grand Teton NP, WY → Yellowstone NP, WY → Salt Lake City, UT
Einat and Avigail: Salt Lake City → Craters of the Moon NM, Idaho → Yellowstone NP → Grand Teton NP → Rocky Mountains NP, CO → Denver (Plus Mt. Evans, CO)