From Toronto in mid September to Quebec City in late September, hypothetically you really could encounter everything from shorts-and-sunscreen weather to boots-and-jacket weather.
The driving distance between Denver, CO and Salt Lake City, UT is 536 miles. The driving time would be approximately 8 hours 30 minutes if driving non-stop in good conditions.
505 miles taking this route: Take I-15 NORTH from Las Vegas to I-70 EAST to RICHFIELD and DENVER at EXIT 132 in UTAH.Take I-70 EAST to Grand Junction. 1 person found this useful.