If i have stated a property on a revocable living trust in the state of washington, will the home still go into probate after grantee passes? i

The answer to your question ultimately depends on what the deed states for the property. If the property was transferred by deed into the trust, then the property should be able to avoid probate as the property will pass pursuant to the terms of the trust, as the trust has become the "legal owner" of the property. Now, if the property was simply listed as an "asset" in the trust and the deed still has your father's name on it, then the property will have to be probated to remove the property from your father's name.