The antidote to depression is social connection.
I say this to every one of my clients. Just when you want to hole up and isolate is when you need to force yourself to connect. Almost 100% of the people who do it say it is hard, but works.
And I don't have to tell you about the mental health benefits of cycling. In many cases, it works as well as medication for both depression and anxiety. I am not anti-medication, but I always try to help people understand how endurance activities and being outside works.