The official 2016 Nenana Ice Classic Poster

The tripod was raised for the 100th time on the Tanana River Sunday, kicking off the 2016 edition of the Nenana Ice Classic.

That first year, 1917, the jackpot was $801. The largest jackpot came in 2014 when it hit $363,627. On average, 290,000 guesses are made each year. You have until April 5 to make your pick. As of March 1, the river ice was 40″ thick where the tripod now stands.