A woman from Greenburgh and her partner completed an extreme challenge of hiking and running across the deepest lake in the world.

Alicja Barahona and her partner trekked the nearly 400-mile Lake Baikal in Siberia, Russia, over 12 days.

"It's 1 mile deep, but at winter time, you don't feel any depth of the lake. You run on the ice, which was 3 feet or plus thick,” she said.

Barahona says there was a scary moment during her trip when she saw a crack opening in the ice.

She says it was a clear reminder of the dangers of her adventure.

"You don't see the water, but you see the how the ice is opening.  And the noise associated with the cracking of the ice,” she says.

Barahona says the conditions were rough, but not as expected. She said it was unusually warm during the day, but at night, it dipped down to 20 degrees below zero.

The ice may have been smooth, but Barahona says there were some rough moments, including when a fox took a loaf of bread from her bag.

She says she's still settling back home, and is already thinking about her next challenge.