@Kristen Thanks for reaching out!
Altra is one of the only brands we carry that makes exclusively zero-drop shoes and boots. We have a couple of options that may work for you:
When considering fit, we recommend thinking about warm socks as these are not insulated boots.
Hopefully this helps, thanks!
I had bad luck with the Lone Peak RSM. Both shoes developed holes in the fabric near the big toe within about 150 miles of snow/slush hiking. They were no longer waterproof, of course, so I returned them.