To get to the viewpoint I used to get this shot you will need to go to Eagle River and find Skyline Drive. You will need to drive to the top of Skyline Drive to the parking area, from here you can see down to Mt. Redoubt and towards the north you can see Denali, if the sky is clear.
The view of Mt. Redoubt from the Anchorage area is often spectacular, if you have a day with little to no clouds. This particular shot was awesome because the volcano was letting off a little steam that night.