Was looking at some photos of Chiang Mai at webshots when I saw the below pool. Looks great!

Unfortunately, the caption simply says 'Pool at International School Chiang Mai'.

That narrows it down somewhat...

Anyone happen to know which one it is and whether it's available to the general public / via membership etc?

I cannot see the pic on my 'puter. But if it is the one I am thinking of it is at the International School. Out by the Airport & Central Shopping Cntr. We used to play squash out there (5 great courts till they varnished the floors ). It was a sport club then. The school took over about 2-3 years ago. Heard you could use them for a while, through a membership, but now cannot. Maybe some one else has better info.

Where you describe is Grace International School.

Grace International School - Used to be World Club Sports Club and had the largest swimming pool in the north of Thailand. Some World Club "Members" still have the right to use the pool & other facilities.

I am told Grace intend to fill most of it in and build over it. They don't need such a large pool for their students.