I will be traveling by rental car from Salt Lake City, UT to Denver, CO (one-way) at the end of May. Other posts touch on this subject, but I need updated advice. Which route would be best for a first-timer to the area who is looking for pretty scenery (at least at highway speeds):
1) via I-80 through Wyoming,
2) via US 140 through Colorado, or
3) some combination of the two? OR
4) drop down to Grand Junction and go into Denver via I-70?
One poster said the Rocky Mountain National Park/Estes Park/Boulder route would be the most scenic. And someone else said that the I-80 route was the most scenic. Who's right?
Also, computer mapping programs put both road trips at around eight hours driving time, give-or-take. I'm not on a deadline, but is that realistic given that both routes appear to be pretty mountainous? Research already has shown that the Trail Ridge Road portion is estimated to take half-a-day. Any other big delays like that one along the way?
Thanks in advance for any tips or advice.