My family and i have a Valid United State Visa but can we join the trip to Quebec Canada?
As with entry to all countries, the answer depends entirely on your citizenship...and you haven't given that information. Canada is not the United States. If your citizenship requires a visa or ETA (Electronic Travel Authorisation) to enter Canada it is highly unlikely that your US visa will be enough in itself.
Check the official Canadian government website to see what the entry requirements are for your citizenship: