Richard67 said: I will be in Murren this weekend. Is the restaurant open to the public for the season?
Hard to say, unless you mention the name of the restaurant in your question. ;-)If you do know the name, you might do a Google search....
From the thread title I assume you mean the Alpina Hotel. The hotel is open this weekend, so the restaurant should be too. Most restaurant are closed one day per week or so, but usually that's not in the weekend.