The Greatest State in the UnionI think my favorite vacation destination (after Walt Disney World) in America, is the state of Colorado. I have not been to all of the states, but I traveled to many of states when I was younger. Nothing beats Colorado. If you are driving there from the east, it can look pretty boring when you cross the state line. However, once you enter the Rocky Mountains, you'll never want to leave.
Summit CountyFor many years my family has been spending time each summer in this beautiful area. It is home to many famous ski areas such as Vail, Copper Mountain, Breckenridge, Keystone, etc. I have skied most of these, because they are all within convenient reach from Frisco. Whether it is summer or winter, I recommend staying at a Frisco Townhome and commuting around from there.
Mountain BikingI have not had the chance to mountain bike in a lot of states, but from my experience, Colorado is the best. More specifically, Summit County is the place to be. I have done a little biking around Winter Park, but after spening many summers in the Summit County area, my parents retired there. There are tons of mountain bike trails there. Plus, the Colorado Trail (a 500 mile system of trails from Denver to Durango) also runs through the area. My favorite trail is the famous Peaks Trail between Frisco and Breckenridge. If you stay in Frisco, you can ride uphill as long as you like, and the coast back to where you are staying. There are many sports shops that rent skis in the winter and bikes in the summer, and they would be happy to sell you a map and point you in the right direction. Enjoy.
Road BikingThere is an extensive paved trail system that one can take from Breckenridge to Frisco, to Vail, and all the way up to Keystone. The trail can get crowded on some days, but generally it is brisk ride through the forest, over the pass, and across the dam. A great way to see some of the passes in Colorado is to Ride the Rockies. This is a 7-day bike tour that covers 400 miles of Colorado's backroads each June.
HikingOne day this year my brother, mom and I decided to climb up Mt. Royal. This is not one of the highest peaks or the most difficult to climb, but we chose it for its proximity to our condo. After an hour or so, we reached the peak of about 10,500ft. We took many pictures of the surrounding valleys including a fourteen picture 360 degree panoramic picture.
EtcAs far as I know, you can enjoy just about any outdoor sport that you want in Colorado. Summit County has Lake Dillon for water sports (though cold) and we have taken a couple raft rides in the area. If you like fishing or hunting, I think you would not be disappointed. I don't really want everyone to spend there summers in Colorado, but I thought I might share my love for the state with anyone who would listen.