The first year he raced the Arrowhead Ultra in 2013 was probably the toughest, Scott Jensen says; he almost dropped out.

Exhausted after spending the previous 20 hours pushing his fat bike through 35 miles of soft snow that was too mushy to ride in the warm conditions, Jensen, of Grand Forks, trudged into the third checkpoint on the 135-mile race route prepared to throw in the towel.

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Somehow, though, he found the inner drive after a short rest to continue the grueling wintertime race that takes 150 or so competitors on foot, bicycle or skis from International Falls to Tower, Minn.

He completed the race in 52 hours, 18 minutes.

"Everybody else behind me quit," Jensen said. "I just decided, I'm here, I took the days off from work, I'm going to push it so I started off again.

"It takes a lot to keep going."

A Grand Forks attorney, Jensen, 56, will be back on the trail early Monday morning for his sixth Arrowhead Ultra, a race first held in 2005. He's the only Grand Forks racer in this year's Arrowhead, which wraps up Wednesday.

Jensen credits local biking enthusiasts such as Pat White of the Ski and Bike Shop for getting him started in the Arrowhead. After nearly dropping out that first year, he trimmed more than 18 hours off his time in 2014, a year when the temperature along the trail route dropped to 34 below zero.

Jensen placed 16th that year, his best finish to date.

"All the good bikers quit," he said with a laugh.

Lifestyle change

On a recent balmy January afternoon, Jensen was riding his Salsa Beargrease fat bike along the Grand Forks Greenway training for the race. Whether on mountain bike, fat bike or traditional road bicycle, Jensen says he tries to ride at least three to four hours every day year-round, sometimes up to 100 miles, and compete in one race a month.

It's part of a fitness regimen that's been a way of life for the past 15 years, Jensen says.

"I went 25 years from age 17 to 42 getting zero exercise," Jensen said. "I didn't even walk. So, I started to try to do something a little better. I lost a bunch of weight, and I decided I'm going to exercise a little. And I think every year, I decided to do a little bit more."

The Arrowhead Ultra definitely qualifies as "a little bit more." Jensen says people often ask why he puts himself through it, given the risks of riding the remote landscape in all kinds of weather conditions.

"We call it Type 2 fun," he said. "It's fun when you think about it later. The year it took me so long, I got (within feet) of a wolf. It just sat there, right on the trail, and eventually it got up and ran away. There are just cool things to see, but there are a lot of moments when it's tough, too.

"I enjoy the challenge of it."

Gearing up

Arrowhead rules require participants to carry a sleeping bag rated to 20 below zero, a sleeping pad, bivy sack or tent, a stove, 8 ounces of fuel at all times, a headlamp or flashlight, flashing red LED lights, 10 inches of reflective material front and back, at least 3,000 calories worth of edible food and a whistle on a string.

Jensen says he prefers to power through rather than try to camp along the route.

"I just keep moving," he said. "You're soaking wet, and I think you're going to get in trouble if you stop."

For clothing, Jensen says he dresses in layers, added a base layer for every 10-degree temperature drop. He buys boots a couple of sizes too big, wearing two pairs of socks with plastic bags between the inner and outer layers.

"The inside layer will be wet, but it will be warm," Jensen said. "That will get me through 35 below zero."

Racers also carry Spot Tracker devices, allowing people to follow their course online in real time along the race route. The device also has an SOS alarm to alert organizers in case a racer gets into trouble.

"People do get hurt," Jensen said. "It's hilly in places so you can get going pretty fast, and if you get a little sketchy on the downhills, you can crash pretty good."

Fun suffering

As the race nears, Jensen says he doesn't focus on beating his previous finish times because the weather and snow conditions vary so drastically from one year to the next.

He admits, though, that he'd like to top last year, when he finished the race in 24 hours, 19 minutes, his best time to date.

"I suppose I'd like to beat that, but I think it's more just about doing the best you can on a particular day," Jensen said.

The only guarantee, Jensen says, is that he'll be pushing himself to the limit, not only physically, but mentally, which is a big part of any long-distance race.

"It's more about your guts than it is about your speed," he said. "I'm excited and nervous. Even though I've done it, I'm nervous,

"You know it's going to be fun. You know you're as ready as you're going to be. You know there's going to be pain, you know there's going to be suffering. And that's why we do it-we do it for the suffering."

• On the Web:

class='subhead'>Scott Jensen finishes

Here are Scott Jensen's finish times in the five Arrowhead Ultra races he competed in before this year's race, which gets underway Monday in International Falls, Minn.

• 2013: 52 hours, 18 minutes, 39th place.

• 2014: 34 hours, 10 minutes, 16th place.

• 2015: 25 hours, 50 minutes, 38th place.

• 2016: 39 hours, 14 minutes, 45th place.

• 2017: 24 hours, 19 minutes, 49th place.