The trio began their journey on 2 September and finished on Wednesday.
They were joined at one point by Dr Smithson’s seven-year-old neighbour, Will, and his dad, who cycled with them for 26 miles and raised £622.
Dr Smithson said she had many highlights of the trip and was grateful for all the support she had received.
“I would just like to say a big thank you to everyone who supported us, friends, family, people we’ve never met, people who shared their stories, people who handed us money through the journey,” she added.
“You may have to make some adaptations, but with perseverance and the support of loved ones, adventures are still possible.”