Other than running tracks in your own home area, you can try going out to some parks or running tracks. I've tried some over these past few years and I have my favorites (Taman Tasik Titiwangsa at night, Taman Rekreasi Bukit Jalil on weekdays and Taman Tasik Perdana - all the time).
Here is a list of running trails that you can try:
1. Taman Rekreasi Bukit Jalil
Crowd : Crowded on weekend and 5-7pm on weekdays
Distance : 3 - 8km
Level : Vary - it got normal track for beginner, and hard ones for bigger tracks and hilly
Public transportation : None
Night : Closed
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2. Bukit Komenwel Bukit Jalil
Crowd : Crowded on weekend and 5-7pm on weekdays
Distance : Vary, 2 - 5km
Level : Vary, flat and hilly
Public transportation : LRT Sri Petaling & Bukit Jalil
Night : Closed
*
3. KLCC Park
Crowd : Very crowded - all the time
Distance : 1.3km per loop, marking tracks for every 100m
Level : Easy, synthetic rubber pavement
Public transportation : LRT KLCC
Night : Open until 10pm, well-lit, security guards
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4. Taman Tasik Titiwangsa
Crowd : Crowded on weekend and 5-7pm on weekdays
Distance : 2.5km per loop
Level : Easy, flat track
Public transportation : None
Night : Open, people start running around 8.30pm, avoid running alone
*
5. Taman Tasik Perdana ( Botanical Garden )
Crowd : Normal, crowded on weekends
Distance : Vary, the park is huge
Level : Vary - Stairs, hills, flats
Public transportation : LRT KL Sentral
Night : Closed
How to walk to the park from KL Sentral (click on the image to make it bigger) :
I used to walk from KL Sentral to the park, it is not quite far if I use the pathway leads to the small park entrance right next to our National Museum. I'm not quite sure the status of current MRT construction next to the museum (whether they blocked the small road or not), but I used to use the stairs and the pathway all the time before this :
You need to cross the small road, towards the museum. There is a pathway in between of MRT construction side and the museum that lead to the small entrance to the park :
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6. Putrajaya - not in KL
Crowd : Not so crowded except on event days
Distance : Putrajaya is huge, less car, you can try new routes every time
Level : Vary, open road, mostly flat sometimes hilly
Public Transportation : No trains, just bus
Night : It's an open road, never tried it except on events, quite calm & silent - preferably in big group
7. Taman Pemaisuri, Cheras
Crowd : Normal, crowded on weekends
Distance : Vary, the park is huge
Level : Vary - Stairs, hills, flats
Public transportation : LRT Cheras, but you need to walk 15 mins more
Night : Not quite sure
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Note : Running at night after work is quite new to me, but I found it quite satisfying. Less people, cold and calm, no hot sunlight, silent paths so that I can focus solely on the running. The best part is I can run 3-4 times a week after work :D If you have running partner or running group, I suggest you to try this.