Plains, mountains and winding country lanes lie ahead for an Attleborough man and his Brazilian girlfriend.
Chris Sams, 34 and Catarina Stigliano, 27, are cycling all the way from Gibraltar back to the UK.
In doing the 1,238 mile trek, they hope to raise more than £1,000 for East Anglia's Children's Hospices.
Mr Sams said they were looking forward to completing the challenge after setting out late last week.
He said: 'We will be cycling in areas that commonly reach 40°C, plus going across the Pyrenees, which climbs pretty high.
'Furthermore we'll be progressing through Bordeaux, and the west coast of France, before getting to The English Channel.
'The roads are a bit sketchy too, so we're expecting plenty of punctures.'
Mr Sams is a designer, and Ms Stigliano is a creative strategist. They both live in Spain, and work across the border in Gibraltar.
He said they were ready for the challenges ahead.
Mr Sams said: 'The hardest part will be the desire to get back on the bike each morning, in pain from the previous day's trauma.
'We will need mental strength as well as physical to ensure we don't stop for too long.
'Furthermore, the heat and sleeping in a tent will add to the challenge for sure.
'The drive to get back home too, and present the money to EACH will really drive us forward.'
Mr Sams said they both thought EACH was a worthy charity to support, but that was not the only reason they were doing the bike ride.
He said: 'We both suffered with asthma as kids, and both know that the reason we were able to get through it was due to the strength and care of so many people around us. It's a local charity too, meaning we feel we are giving back to Norfolk too.
'I'm a season ticket holder at Norwich City, so need to be home for the start of the season.'
Anyone interested can follow the ride on Instagram, their accounts are misterchrissams and yours_sincerely_catarina
Donations to their fund-raising effort can be made at justgiving.com/fundraising/Chris-SAMS3
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