How many giant garter snakes are left ithe wild?

This is the snake that has made Manitoba's Interlake region world-famous for snake-watching! Some snake dens (or hibernacula, singular = hibernaculum) contain 10,000 garter snakes each winter. In spring their mass emergence creates an awesome natural spectacle The chances of a snake reaching 12 years of age are less than 1 in 5,000.. that is the best i got. you could also always say too many to count!