Monadnock Ledger-Transcript Published: 5/19/2021 3:50:46 PM Just before embarking on the Mason-Greenville Rail Trail, Aislinn Graves proudly showed off her straw boater hat, full of pins from national parks from all over the country. “Most little girls, they want to grow up to be a nurse, or a ballerina,” Aislinn, who’d visited most of the national parks west of the Mississippi by the time she was seven years old, said. “Me, I wanted to be a national park ranger.” These days, Aislinn is back to immersing herself in nature on every trail she can manage in her new mobility scooter, which is only a fraction of the many hiking and walking trails scattered across the region.