We are also in New England and did not have a ring for about our first 10 years here. Our paddocks on the property are not great for riding. We do have access to trails.
During the better weather we did a combination of trail work, using a neighbor’s large field, and for about 2 years hacking through the woods to another ring. (Unfortunately, that property was sold, so we lost that option.) We would truck out regularly for lessons during this time. Even now with our own ring, we still use the trails and the field for fitness and to mix it up.
Now winter, another story. The trails get super icy, especially in years with a lot of rain, like this year. Our ring was even covered in ice for the past 3-4 weeks until yesterday. In addition, the limited daylight is so challenging. I know people ride in the dark, but to me dark, ice, 20 degrees, and wild horses is not worth it.
I sometimes plan to trailer out to an indoor a few days a week, but even that with cold, dark, work, and other life, the motivation wanes. This week looks a little better. Maybe we will start back to work, maybe not. I’ve finally learned to be okay with what winter is and not stress.
We have often boarded out or sent out for training 1-2 horses during the worst months. I have one young one out for training now. This helps to be down a horse in the worst weather and to keep fitness or brains engaged.
So, yes, you can absolutely keep them at home with no ring. As others have said, you may need to adjust your winter goals, but the other three seasons are great!