Have you ever had a day where you just want to get away from everything and everyone? Do you remember that great feeling you get when you just finish exercise and everything is going great? Camping can be an inexpensive way to feel great, get away from people and get some exercise one. There are many options for inexpensive camping.
One of the best options is if you have a van or RV parking in truck stops and spending the night there and then jogging or driving to the nearest camping areas. Another option is finding some of the free and inexpensive camping ground that actually still exist. In general these sites have no water, no amenities, but the price is right. Typically they require some hiking in. One of the best isolated places I have found is Death Valley. Granted you have to prepare, plan ahead, and accept no amenities but there are many places you can go to there and camp for free. One tip if you do go is one way to stay cooler is to cover yourself in a wet towel.