Photographers are being invited to share their favorite winter images of the region with the public during the Fourth Annual Winter Photo Festival to be held next week in West Yellowstone. The festival will be held at the West Yellowstone Visitor Information Center on Monday at 7:00 pm, sponsored by the National Park Service and the Grizzly and Wolf Discovery Center. Photographers are asked to bring digital photos taken in Greater Yellowstone Ecosystem on a thumb drive or photo CD so they can display and narrate their photos. Participants must register by 5:00 pm Monday. Information about the festival is available from Yellowstone at 307-344-2840.