Uranus ji,

If you go to Boulder Downtown (Pearl Street), there is a visitor information place right infront of Boulder Court House. You can get FREE maps and information. There are tons of map with hiking trails. The best hiking place in Boulder is Mount Sanitas. It is close to donwtown and is on Maplton street right behind Boulder Community Hospital (Mapleton Campus). Another great place is Red Rocks in Boulder which is in walking distance from Mt.Sanitas. Both places has a great view of city of Boulder.

Estes Park is only 45 minutes from Boulder. There are several nice hiking places there too. If you want to enter Rocky Mountain Nationl Park, the free is $ 20.00 for 1 week or $ 40 for annual pass. I would suggest you get the pass and go to Bear Lake, it is beautiful. There are several other lakes in near by. Alberta Falls is amazing and it is only 1 miles hike up from Bear Lake parking.

Colorado Spring is about 1 1/2 to 2 hours drive from Boulder, depending on the traffic. Garden of Gods is free and you can walk around, it is sourounded by big giant red rocks, great hiking. Cave of the wind is near by and you can pay $ 20 to take 45 minutes tour inside the cave. It is about 55 degrees inside the cave so it's a good idea to have a nice jacket. Royal George is in Colorado Springs too, $ 25.00 for entrance free. Seven fall is another great place in Colorado Springs.

Colorado is a great place, awesome place for pictures. Have a wonderful trip.