Maynard, who is engaged to entrepreneur Jef Holm after meeting him on the show, took to her Facebook page to post a photograph of herself and her fiancé.
"Thank you to everyone for all of the support you've given me since starting this crazy ride!" she wrote. "I couldn't be happier with how things have turned [out] and look forward to what the future holds for all three of us."
Maynard, who has a 7-year-old daughter, promised fans that she will check her Facebook page more often and added: "You guys are seriously the best! Thank you!"
Maynard and Holm recently returned from a week-long humanitarian trip to Ghana, where they turned on wells built with money donated by Holm's company People Water.
Maynard has said that she had "so many life-changing experiences" during the visit.