Hi I am planning a couple of weeks riding from early to mid September. I am definitely going to Moab but would like to try crested butte or vail etc. Are the ski resort chair lifts still running for mtb at this time of year ?. Any suggested places to,ride would be appreciated. I am flying into Denver I think and driving from there . Coming from Australia so Would be a bit of a bummer if the ski parks were not running . Do they run 7 days a week ? Thx in advance Pat.