calvarez said:
There's a trade conference there the last week of October and I'm thinking of riding to it from Phoenix. What are the typical weather conditions there during that time?
The weather is too hard to predict for that time of year. I rode from Southern California to Denver last October. There was considerable snow on I-70, so I took I-40 to I-25. It was cool, with some rain and temps down in the high 30s going north on I-25.
The return trip on 15 October was a SaddleSore 1000 from Denver to So. Cal. with sunny, clear weather via I-70 and I-15. I left Denver at 7:00 AM (Mountain). Temps were in the low 40s, dropped into the low 20s going over the Rockies. From Grand Junction on, temperatures continued to warm up, reaching a peak of 98 in Mesquite.
If you are planning to ride in Colorado in late October, be prepared for extreme cold, snow, and ice, but you could encounter anything.