Pro Gym is located near the clock tower in the center of Chiang Rai. This gym is a large open aired gym under a corrugated steel roof with lots of parking.
The gym has a many cardio machines from treadmills, bikes, and ellipticals. If you're a follower of this blog than you already know when traveling we search for gyms with a squat rack and an area for deadlifting. Pro Gym has a single squat rack and while there's no deadlifting platform there are many areas one can deadlift.
The staff at Pro Gyms are kind and keep the gym clean and are happy to assist any way they can. The gym has many Hammer Strength machines, barbells, and dumbbells. Do bring a towel as there are showers in the locker rooms.