The run through Leeds' Temple Newsam Estate includes the ominously named "cardiac hill." Here are the top 10 best photos from Sunday's event as taken by the YEP's Simon Hulme.
7.
While some took an untimely tumble.
8.
"If you love mud and you love a good goodie bag then come along to our race." was the message of organiser Stuart Gall.
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The route contains the ominously named "cardiac hill."
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The run saw an even split with 399 men and 374 women finishing the race.