The runner evencelebrated her 31st birthdayhalfway through the route.

Im spending my birthday running 58ish miles on my favorite trail with some great people, she wrote.

Physically and mentally I feel amazing!

Mornings are pretty tough for me though.

Warming up and waking up takes around an hour but after that Im moving!

Lastly Im finally in the triple digits!!

Im so happy to finally be in Virginia, my favorite state on the Appalachian Trail.

40 days 18 hours 5 minutes, Dower wrote onInstagram.

Finishing the Appalachian Trail in the fastest known time is a dream come true.

If Im to be honest I didnt think it was possible.

However, I had people on my crew who believed in my abilities and pushed me to my limits.

Thats all it was.

Everyday waking up, getting on trail, doing my best and trusting @chumpchangefkt, she added.

Incredibly thankful for ALL the crew, pacers, and friends who came out to help.

It would have not been possible without yall.

My brain is still foggy and Im still processing everything.

There will be more in the coming days but for now thank you for all the support!!

Ultimately, Dower hopes to inspire her fellow female hikers.

I truly believe that women haveIve said it beforewe have a special gift of endurance.