Where to run? Places to run?

The Army Half Marathon and Nike Human Race is approaching, and I have increase my frequency of running. Usually I will run at the track as it is easier to the knees, its free, and its convenient for me. But is there like a best place to run? What is the difference between running on track and running on concrete?

Grass - The grass is a great place to run because it is easy on the knees and on the ankles, and it provides extra resistance to the runner, but this also means that you cannot go fast running on grass. But most of the grass patches in parks in SG are not for running, maybe the grass field in the stadium will be a good choice.

Stadium Track - The track is easy on the feet if the track is a pretty new one, as some of the worn out tracks are no better than concrete. Another plus point is that it is obviously easier in measuring distance, and tracks can be found in all stadium. Not too sure if colleges tracks are now still open to the public. anyone care to tell me?

Concrete - A lot of impact to the joints and tendons, but it is the most convenient place we can run. Difficult to gauge your distance, but you can go to www.can.com.sg to plot your running points to measure the distance. Provides scenic view too, but be sure to wear a good running shoe if you are running long distance on concrete.

Treadmill - Running like a Lab Rat... Boring, but acceptable...maybe you can listen to your favourite music or watch the TV while running. Treadmills generally don’t provide enough intensity for running, and you cannot sprint or slow down as and when you feel like. Some threadmills provide good absorption, while some cheapo ones can be quite bad to your knees, but ideal for sunny/rainy Singapore.

Sand - Many people hate to run on the sand, but the sand is actually the best place to run sprints and intervals. This is bcos, the sand provides much resistance to the quads and the calves, causing explosive power to quickly ensue. But it is recommended to run long dist on the sand.

Trail - Trail such as those in Parks are often hilly and you might be very susceptible to injuries or even sprains. Impact absorption wise is not too good as trails can be quite nasty sometimes. But the ups and downs slopes provides extra resistance to your quads.

so where do you like run? =)