Joanne Pearson of Birch Avenue was returning home while walking with her dog and a friend, Phil along Sandsend ravine on a stormy night last month.
She said it was around 10.30pm at night as they walked under the golf bridge and turned to the right that she first caught sight of the animal which appeared to be an enormous four foot high and three foot wide.
In a letter to the Whitby Gazette she recalled: "The bottom of it seemed to have no legs and just resembled an over sized bean bag sat there.
"It certainly was not a badger or a deer as it was too big, fat and round."
The strange creature was positioned next to a hedge and it looked so unusually big that both Joanne and her friend stopped in their tracks and the pair didn't dare move and it wouldn't move either.
"If this was an animal then it would have scampered off but it seemed quite content to stare back at us.
"We stopped where we were and we let the dog investigate it as we were not preared to go any further until it budged.
"The dog spotted it and went racing up to see it off so it was obvious by her natural chasing instinct that this was some wild animal.
"As she approached it the odd thing was that there was no scuffle or running involved. The black thing seemed to glide sidewards very gracefully and quietly like a ghost into the grass. "The dog then ran up through the hedge and she gave a yelp. Only the dog will know what it was I expect," she said.
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