If you wish frogs in your pond, you should take measures to attract local ones, or at least find some that are from near you. Many states have legislation making it illegal to release captive animals. If you move frogs from California to Washington, you could kill the frogs your release as they may not be adapted to live in the environment you provide them. You could also (much worse) contribute to the spread of numerous pathogens, fungi, bacteria, and parasites that could culminate in many amphibians dying.
I would suggest heavily planting your pond with emergent vegetation around the water, with gradual sloping banks, and providing a thick layer of muck (later to be detritus) at the bottom. This will most likely attract local amphibians, which is more desirable and responsible from an environmental standpoint.