Really, it depends on the snow leopard. Probably really fast. If this helps, snow leopards can leap 14 meters! :)
if they only shake their tail a bit it means there about to pounce
they camouflage and then jumo out and run fast and pounce on their prey
As fast as a leopard
A leopard can run at 35-45 mph
Prairie dogs are fast and have sharp teeth. They pounce and bite.
They can run very fast and kill antelopes.
90
A snow leopard can reach 33 mph (53kmph)
Actually I think leopards are more fast.
35/45mph
1,000,000,000,000,000,mph
they are fast in the water but lose their agilty and fastness on ice