LEHI — No one knows for sure how it all started, likely one lumberjack challenged another to chop through a log, then one camp challenged another ... and today, chopping and sawing events are a worldwide sport.

The best modern-day lumberjacks in the world will be at Thanksgiving Point on Friday and Saturday to compete in the Stihl Timbersports series, one of the activities in the Wild Outdoors Festival.

Official lumberjack competition started in 1927 in Germany. It came to the United States in 1974 and became the Stihl series in 1985, the same year ESPN began airing competitive events.

"Now we have athletes from all over the world competing. This year we probably have the largest international field. We have athletes from the Czech Republic, Switzerland, Australia, New Zealand, Canada and the United States, to name just a few of the country," said Roger Phelps, promotions communication manager for Stihl.

"We'll have two events here in the United States, at Thanksgiving Point and in Ohio, and events in 18 different countries. Then we'll hold the World Championships in Ireland."

There will be 32 athletes competing in the six chopping and sawing events, 10 in what is called the "boom" run and 10 in a climbing event.

The events:

— Boom run. Here women run over seven logs tied together in a 70-foot pool of water, "which is what loggers had to do in rivers when there was a log jam," said Phelps.

— Speed climb. Athletes will climb a 60-foot tree in less than 18 seconds to be competitive.

— Underhand chop. Athletes will stand on a log and chop through it.

— Standing block chop. Athletes will chop through a log standing vertically.

— Springboard chop. Athletes will cut notches in a 9-foot pole, then place boards in the notches in order to climb up and chop through a log on top of the pole ... "which is similar to what loggers had to do in order to get to a point where the tree was thin enough to saw through," said Phelps.

— Stock saw. Two athletes will use identical Stihl saws to cut through a 16-inch log twice.

— Single buck saw. Athletes use a long saw with razor-sharp teeth to cut through a 19-inch log.

— Hot saw. This is the high-performance event. Competitors build their own power saws, many times using a snowmobile engine that runs on alcohol, with a monster chain, to cut through a 19-inch log three times in around six seconds.

Jason Wynyard of New Zealand, a seven-time champion and professional competitor, was on hand earlier this week to demonstrate the various logging skills.