Rodney Smith Jr., the owner of a lawn care company in Huntsville, Alabama, left his home earlier this week to get to his final two states -- Alaska and Hawaii, The Atlanta Journal-Constitution reported.
Thursday, he made it to the Hawaiian islands to finish his job, ABC News reported.
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He posted a thank you video that included some of the people he's helped, some featuring photos of their time of service in the military.
His mission started in 2015, when he saw an older man in his hometown having trouble mowing his lawn. A month later, he had mowed his 100th lawn, Smith told The Atlanta Journal-Constitution as he drove from New York to Alabama earlier this month.
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"It looked like he was struggling, so I pulled over and helped him. That's when I got my goal to mow lawns for free for the elderly, single moms and veterans," Smith told ABC News.
Then he recruited young people to help when he realized the job was too big for just one man. He started the 50 Yard Challenge, which has spread around the world.
Eventually, he decided to make it his goal to focus on veterans.
He drove through the lower 48 states, but had the help of Atlanta-based Delta Airlines to get to Alaska and Hawaii, the AJC reported.
"I've come across so many veterans that are struggling to get their lawn mowed. If they served our country, we should step up for them," Smith told ABC News.
“This is the least we can do. This is the last thing they need to worry about,” he added.