BillV/Redanman,
Although you're correct about the location of most of the ski areas (ie west of the continental divide), a lot of that water is sent to the Front Range communities via pumps and tunnels built back in the 1930s, especially the Roberts Tunnel that sends water from Lake Dillon, which you see from I-70 near Frisco on the way to Vail. As Matt knows, unfortunately Lake Dillon has become Pond Dillon, a huge reservoir that's almost dry.
Some of the courses have their own well water (eg Wellshire Municipal, one of the spared Denver city courses) or well developed water rights that are helping them right now. My club, Denver CC, has both. I think Murphy Creek (in the east suburban Aurora city system) may be better off than several other Aurora courses, which may meet the fate of the Denver courses. Don't know about Pueblo's Walking Stick. It is a very good course, hope it can hang in there.
All The Best,