Gobi the stray dog, who ran more than 100 kilometres across China in an endurance race with running buddy Dion Leonard, has been reunited with him after going missing.

The pair became inseparable when the dog initially “appeared from nowhere” while the Australian athlete was competing in the 250-kilometre Gobi March footrace across China earlier this year.

They ended up finishing the race together, with Gobi completing 125 kilometres of the race.

The bond between the two became so strong Leonard had decided to adopt the stray dog and bring her back to live with him in Edinburgh.

Gobi had been due to fly to Beijing to begin the adoption process when she went missing in the streets of Urumqi in north-west China.

Leonard flew to the region to search for her on August 20, and after five days of searching the pair were reunited.

“Gobi has been found! She’s safe and well, a wee sore leg but overjoyed to see Dion,” a post on the Bring Gobi Home Facebook page said.

Leonard said when he first saw Gobi he thought she would not last the day running with him, “but 25 miles I think we ran that day and she was still with me at the end”.

He said she would have completed more of the race with him if not for the 52-degree temperatures of the Gobi desert.

We bloody well found her!!! pic.twitter.com/tIw5fEIDIg

— Finding Gobi (@findinggobi) August 24, 2016

Race organisers ended up taking Gobi to the finish line of the stages she could not complete, where Leonard said she would wait for him to finish.

“It was amazing to see her stand up and see me and come running towards me,” Leonard said.

“It was during those sort of periods that I realised this was something else other than a little dog following me.”

Gobi was found after five days of searching. Photo: 4 Deserts/ABC