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69 flights, 1,396 steps. Now do it in 50 lbs. of firefighter gear.

Thousands of firefighters completed the Scott Firefighter Stairclimb challenge Sunday morning at Seattle's Columbia Tower.

The annual fundraiser tests the strength, stamina, and determination of two thousand men and women willing to make the climb. It's no easy task to trek up the tallest building in Seattle: 788 feet high.

Every year the funds raised benefit the Leukemia and Lymphoma Society.

The Leukemia & Lymphoma Society posted a livestream of firefighters finishing the climb: