To remove someone from appearing in your feed, you will simply need to unfollow them. Here's how you can do so:
Via desktop or laptop computer:
- Log in to your account on https://www.alltrails.com/
- Hover over your profile photo and in the drop-down select 'Members'
- Type in the name of the member you wish to search for
- Visit their profile page and click the 'Unfollow' link under their picture
Via iPhone or Android app:
- Open the AllTrails app
- Tap on 'Profile' on the bottom navigation bar
- Tap on 'Following'
- Find the user you wish to unfollow and tap on their name
- Tap the 'Unfollow' button at the top of their profile page
More information on following and unfollowing AllTrails members can be found here.