Moon Milk Review (MMR) runs a monthly prosetry contest.

 The new prosetry prompt for each month can be found in the newest issue. The cover page for the monthly issues is www.moonmilkreview.com.

MMR is a literary fiction focused magazine with an appreciation for experimentalism, magic realism and surrealism, and both long and flash fiction, as well as mainstream with kick. We also run a monthly gallery of artwork each issue, and often try to pull in other mediums.
In September, we have a guest editor/judge for our Prosetry Contest—Ben Loory, author of “The TV,” published this year in The New Yorker.

Visit the website for details & guidelines: http://www.moonmilkreview.com/guidelines/