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.
Driving distance from Salt Lake City, UT to Yellowstone National Park. The total driving distance from Salt Lake City, UT to Yellowstone National Park is 367 miles or 591 kilometers. Your trip begins in Salt Lake City, Utah. It ends in West Yellowstone, Wyoming.