It's a shame that hike is not on the drop down list of activities. It's possible to list my hikes on the web version but not on my phone.
Unless anyone has a solution?
It's a general design flaw that you can't set up the list for the activities you actually do.
In my case I have a lot of pinned activities I will never do, and what I'm doing is mostly clumped together in "all activities".
You can only mail this as an "idea" and hope someday enough people wish for that change.