Boise to Denver roundtrip on 2009 Honda Rebel 250?

I was wondering how this would fare. I've heard differing opinions. I have taken it on the freeway and it seems great but I've heard they can overheat if they're going too fast too long. I really want to take this thing down to Colorado but don't want to stop every hour to wait for it to cool down. Is it safe to take? It is brand new and runs great. Thanks.