The Tahoe Expo, which showcases sustainable tourism activities around Lake Tahoe, runs Sept. 8 and 9 at locations around the lake. The event, presented by the group Sustainable Tahoe, is in its second year. Participants can sign up for environmentally friendly events, many of them guided by experts, around Lake Tahoe. (Above, members of the media prepare to paddleboard during the 2011 Tahoe Expo.)

“The Tahoe Expo will connect visitors to the natural uniqueness of this place through local experts,” said Kim Gorman of the Tahoe Resource Conservation District, one of many groups working with Sustainable Tahoe on the expo.

Events listed on the expo’s website include a 2.5-hour Flyfishing Fun Crawl on Sept. 8 for $20; a Walk with the Wildlife Bear Tour on Sept. 8 for $45; and the Water Yoga Crawl Sept. 8 for $45. The Tour de Tahoe, a bicycle race around the lake sponsored by Bike the West, also is part of the expo.

Lake Tahoe — 22 miles long and 12 miles wide, with a circumference of 72 miles — draws visitors with its clear water and beautiful scenery. Among its many accolades, it was voted Best Lake in America by people responding to a USA today social media contest in early August. But concerns about declining water clarity — currently Lake Tahoe has a water clarity of 70 feet, reduced from 100 feet when readings began in the late 1960s — has led to efforts to protect the lake environment. The Tahoe Expo offers a look at sustainable, fun activities at the lake.

For more information about the Tahoe Expo, visit the event website, www.tahoeexpo.com. For more on staying at Lake Tahoe, visit the North Lake Tahoe Visitors Bureau.