Buy a slice, or buy an entire pie, but if you buy something on August 12 from MacKenzie River Pizza you'll benefit the Glacier National Park Fund.

Could it be any easier to help out a national park? After all, ya gotta eat, no?

Here's the deal:

If you buy lunch or dinner from the Mackenzie River Pizza restaurants in either Kalispell or Whitefish, Montana, on August 12, the company will donate 20 percent of your tab (sorry, not counting any alcoholic bevvies) to the fund, which reinvests in park projects. But to seal the deal, you have to download a voucher from the fund and give it to your server when you pay the bill. You can download a voucher from this site: http://www.glacierfund.org/uploads/MacKenzie_River_Voucher.pdf and print the GNPF Voucher. In fact, you can print more than one and share them with your friends.

The fine print: The Glacier National Park Fund is the non-profit fund raising partner for Glacier National Park. Their mission is to preserve and protect the beauty and heritage of the park for the use and enjoyment of present and future generations. For further information call 406-892-3250 or go to www.glaciernationalparkfund.org.