Earlier this week I posted photos of taken in our backyard leading to the Celery Farm and asked readers what was making these strange, widely spaced tracks.
The four prevalent theories were snowshoes (which no one used in my yard that I know of), deer (just too big and inconsistent with all other deer tracks in the Celery Farm), "more than one foot/paw/etc. in each place" (which is what I wondered as well) and Sasquatch/Yeti/Abominable Snowman.
Thanks to extensive research by Julie, McCall, I believe we have a definitive answer. She supplied it a comment, but I am repeating it below in case you missed it.
Thanks, Julie! (Ginny Chucka also solved the mystery as well, but without the lengthy explanation. Thanks, Ginny!)