A San Francisco-based runner has turned her local streets into a canvas to "draw run" pictures of penises, strippers and dogs using Nike+.
Claire Wyckoff, a copywriter and voiceover artist, first started transforming her runs into artistic creations in June and has since set up a blog to share the work she is most proud of.
Using GPS tracking, Wyckoff runs pre-planned routes that are then mapped through the Nike+ Running app.
Wyckoff claims she is "just trying to save the world" through drawings that include a Corgi dog, a Space Invader and Slimer from Ghost Busters. For the most part, however, Wyckoff likes to draw male genitalia.
"It probably goes without saying, but they're super hard," Wyckoff said on Twitter.
One 'draw run' is a 3.16 mile middle finger dedicated to a friend of Wyckoff who suffers from cancer.
"This run is for Ashleigh Blumer Kohlitz," Wyckoff wrote in her blog. "It's called 'f**k cancer'. Your west coast friends are thinking of you today. Thanks for giving me an excuse to run a middle finger."