\"I remembered a prior conversation with my Grandma Joy when we discussing my 2009 Appalachian Trail hike from Georgia to Maine and she expressed regret that she had never seen the mountains and explored the great outdoors throughout her life, so I invited her to join me on my weekend escape to the Smokies,\" Brad told \"GMA.\"

At the time, Brad was a a fourth year veterinary student at The Ohio State University College of Veterinary Medicine, but needed a break.

\"I needed an escape from campus during my clinical year after news of a second year vet student's suicide was made public,\" he said.

View this post on Instagram

A post shared by Grandma Joy’s Road Trip (@grandmajoysroadtrip) on Jul 25, 2019 at 6:42pm PDT

There's been a lot of laughs and a few hiccups along the for the duo.

A highlight for Brad was \"watching my grandmother tap into her inner child as she rolled down a sand dune at Great Sand Dunes National Park and Preserve at age 87.\" So was being trapped in an hours-long traffic jam of a bison herd in Yellowstone's Lamar Valley, and watching the sunrise over the Grand Canyon.

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A post shared by Grandma Joy’s Road Trip (@grandmajoysroadtrip) on Jul 23, 2019 at 6:26pm PDT

Less fun? \"Being charged by a moose along the shores of Fishercap Lake in Glacier National Park,\" he said.

There was also the time Joy had vertigo at Biscayne National Park in Florida. \"She still managed to take a speed boat to Boca Chita Key and climbed the spiral staircase of an ornamental 65-foot lighthouse on the island,\" Brad said.

The duo hopes to visit the remainder of the parks sometime in 2020 to celebrate Joy Ryan's 90th birthday.

\"We have received a lot of support from around the world so far, and I am hopeful that opportunities will arise to make it feasible to travel with Grandma Joy to the most remote US National Parks,\" Brad said.

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