The Thunderbird is occasionally seen on Lake Tahoe. Photo/LTN file

Having raised $260,000 to date, the nonprofit Thunderbird Lodge Preservation Society needs only $40,000 to begin restoration of the Whittell Waterfalls at Lake Tahoe’s Castle-in-the-Sky: the Thunderbird Lodge.

The Preservation Society’s final push is a for an exclusive evening of fine dining at Thunderbird Lodge, including an elegant cocktail cruise on the 55-foot mahogany speedboat Thunderbird.

Tickets are $100 and must be purchased by June 30. Two winning tickets will be drawn July 1.

A minimum of 100 tickets must be sold for the drawing to take place. No more than 400 entries will be permitted.

They winners may each invite five friends for a “Secrets of the Castle Tour” followed by an East Shore cocktail cruise, and then a three-course dinner on the terrace with wine pairings.

Go online or call (775) 832.8752 to make a donation and purchase raffle tickets.