For three years, Alfred McClodden’s favorite hobby has been running marathons. This weekend, he’ll try to double his fun with a grueling feat most people shudder to even think about.

McClodden, a Tallulah resident who has completed 56 marathons since 1999, will run in Saturday’s 26th Grandma’s Marathon in Duluth, Minn., then drive nearly seven hours to compete in the Green Bay Marathon in Green Bay, Wis., on Sunday.

Two marathons. Fifty-two miles. Twenty-four hours. No problem.

“It’s going to be a challenge. I’m going to have to run smart,” McClodden, 34, said from his hotel room in Duluth. “Probably by the time I get to Green Bay, I’m probably going to be feeling pretty bad by the time I get to the hotel.”

Gloria West, race director for the Green Bay Marathon, said she’s heard of several people trying to complete the double but was still amazed that McClodden would try.

“It’s really tough. I’m an experienced marathoner myself, and usually after I do a marathon I don’t want to do another one for three months,” West said.

McClodden is used to challenges. He’s competed in the last two Boston Marathons and often runs marathons in consecutive weekends, as well as smaller events like 10 kilometer races and lengthy training runs.

One of his goals is to complete a marathon in each of the 50 states, and the Grandma’s Marathon will allow him to cross state No. 37 off his list.

He’s run in Green Bay each of the last two years, and ran his fastest time ever there last year, 2 hours, 55 minutes and 42 seconds. So when he looked at the schedule, and then the map, he couldn’t resist the challenge of running both.

“I’ve done Green Bay the last two years and I like Green Bay,” McClodden said. “Duluth happened to be the day before it, so I figured it was only eight hours away so I’d run it … I haven’t had a challenge like that in a long time.”

McClodden will face a world-class field in Duluth that includes several elite Kenyan runners among its 9,432 entrants. His biggest challenge, however, will come from simply taking on the Green Bay course.

After completing his run in Duluth, McClodden figures to arrive in Green Bay late Saturday night. Since he won’t be able to pick up his race packet ahead of time, he’ll have only a few hours to rest before waking at 3:30 a.m. to head for the course.

The race, which includes more than 5,000 runners, begins at 6:05 a.m.

“The second one is going to be the tough one,” McClodden said. “When I start, my legs are going to be sore. But after five or six miles I think I’ll be all right when my muscles come back.”

Green Bay Marathon officials said they were prepared for any medical emergencies that may arise during their race.

Jeannette Newhouse, the race’s course director, said there are 10 medical stations along the course, as well as marshals on each corner and bike teams that will patrol the course. She didn’t anticipate any problems.

“I’m in awe,” Newhouse said. “If this guy can do this, great for him. People do triathlons and they call them ironmen. If he can do this back-to-back, that’s a real ironman.”