Hi there! I am wondering if anyone has any advice for me for this drive. I am driving from Phoenix, Arizona to Avon, Colorado and I know about two different routes. The first one from Phoenix to Albuquerque, north on I-25 to Denver, then east on I-70 to Avon. The second route north on the I-17 to US-160 through Moab, UT then west on I-70. I am pulling a trailer, and I was just wondering what the best route would be to take. I am looking for the route with the least amount of mountain grade driving. Any advice on this would be appreciated!