Sarah Outen only returned to dry land in August, after 124 days rowing solo across the Indian Ocean, but she has already set her sights on another challenge.

Not content with becoming the first woman and the youngest person to complete the ocean crossing, the 24-year-old has now announced that she hopes to circumnavigate the globe by boat and bike.

The journey would take between 18 months and two years and include rowing 6,000 miles across the Pacific Ocean and 3,000 miles across the Atlantic.

Sarah, of Buckingham Road, Oakham, said: "The trip is something I spent a lot of time mulling over while I was on the ocean. I'm not ready to settle down yet, and my parents always encouraged me to chase my dreams."

Although her plans are still in their infancy, Sarah hopes to start the adventure from London in early 2011 to coincide with the optimum rowing conditions for the two oceans.

The journey could take anywhere between 18 months and two years to complete.

Sarah, a biology graduate, who studied at Stamford High School and St Hugh's College, Oxford University, said: "I'm starting to look at the logistics of the trip and hope it won't take as long to plan as the ocean row."

One of her first jobs is to find sponsorship to keep her boat Serendipity. She had it specially made for the Indian Ocean trip at a cost of £30,000, and since completing the journey has been faced with the prospect of selling the boat, nicknamed Dippers, to pay off her debts. But now Sarah hopes someone will come forward to allow the pair to be reunited for this next challenge.

She also plans to raise significant amounts of money for a young people's charity.

By rowing the Indian Ocean, Sarah raised £30,000 in memory of her father, Derek, who died suddenly in June 2005 after suffering from rheumatoid arthritis for much of his daughter's life. The money was donated to the Arthritis Research Campaign and Arthritis Care.

The charity for the world trip is still to be decided, but is likely to be announced early in the new year, when Sarah officially launches her next campaign.

Since returning to dry land, Sarah has been spending her time writing a book and giving talks to groups across the country.

Tomorrow night she will be switching on the Christmas lights in Stamford, after former Peterborough United Football Club manager Darren Ferguson pulled out.

On Monday evening, she will be hosting a talk about her ocean adventures at Oakham School's chapel at 7.30pm. Tickets are available on the door costing £8 (£6 concessions) with 20 per cent of all proceeds going to Arthritis Care.