Khao Chalak is a high mountain in Bang Phra Subdistrict, Si Racha District. Chonburi Province Travel time from Bangkok 1.30 - 2 hours.
It is the most popular hill training site for runners who living in Bangkok, becasuse it is convenient to travel especially in weekend.
The path to the hill, starts from the uphill point at the back of the Bang Phra Reservoir. Run along steep road to the end of the road
until reach radio telecommunication broadcasting at the top of mountain
There are Strava segments for the uphill and downhill. You must beat the Strava times to claim an FKT!