REI
This is a great store for various outdoorsy sporting goods - whether you need something for camping, kayaking, cycling, snowboarding, skiing, or other types of outdoor activities, this is a great place to get these supplies in the East Chula Vista area. I really like that they don't sell hunting or fishing equipment, because that would give the store a completely different feel. This store has a much different feel than stores like Cabellas since it focuses more on living in harmony with nature and getting to enjoy the outdoors instead of killing animals for amusement. Also, if you are going to a very cold place they have a great selection of fashionable North Face jackets that will do the trick - and they are much cheaper during the summer if you are on a moderate budget.