Finally finished. On July 10, Emily, left, and Kate Nichols hold up 14 fingers to represent their accomplishment of summiting the 14 highest mountains in Maine, finishing atop the West Peak of Bigelow Mountain in the Bigelow Range that runs through Franklin and Somerset counties.

Kate Nichols, 13, right, and sister Emily, 14, have hiked all 14 of Maine's 4,000-foot mountains. Molly, the family's 7-year-old black lab dog, joined the girls on many of the hikes over four summers and about 100 miles on the trail. The girls and Molly are shown Monday at their home in Winslow.

Kate Nichols, 13, right, and sister Emily, 14, have hiked all 14 of Maine's mountains that are 4,000 feet or higher. It took them four summers and about 100 miles on the trail to complete the journey. The girls are shown Monday at their home in Winslow.

Mountain No. 9 for Emily, left, and Kate Nichols was Hamlin Peak in Baxter State Park in 2018, the second highest mountain in Maine at 4,756 feet.

Kate, left, and Emily Nichols said summiting Baxter Peak on Mount Katahdin in 2018, their eighth by finger count, was their favorite. The mountain tops 5,267 feet and is a strenuous climb by any measure.

Mount Abraham was the sixth mountain Kate, left, and Emily Nichols climbed in their quest to summit all 4,000-foot mountains in Maine. Mount Abraham was one of eight mountains the Nichols family summited in 2018.

Kate, left, and Emily Nichols said that their toughest day was when they summited three mountains, South Crocker, Redington and North Crocker, in one day in the summer of 2018.

In 2017, the year Emily, left, and Kate Nichols, with their mothers Brenda Nichols, right, and Chris Nichols, embarked on their quest to climb all 14 mountains of 4,000 feet in Maine, 2017, they started at Sugarloaf and Saddleback.

Kate Nichols, 13, right, and sister Emily, 14, are competitive in seven sports including soccer, basketball, ice hockey, field hockey, lacrosse and softball. They are shown with gear they use in these sports. The girls also climbed all 14 of Maine's 4,000-foot mountains. It took them four summers and about 100 miles on the trail to complete the journey. The girls are shown Monday at their home in Winslow.

Kate Nichols, 13, and sister Emily, 14, have hiked all 14 of Maine's mountains that are 4,000 feet or higher. They are shown with a map and stick pins they used to reference their trip. It took them four summers and about 100 miles on the trail to complete the journey. The girls are shown Monday at their home in Winslow.