From Persa--
"I'm uncertain as to what the final icon on the trail types is --
when I click on it, I get 72 results found. When I click on it again (and it does not change state), I get 18 results found. What am I finding? All trails? The icon is hard to understand."
This can be improved on desktop by adding tooltips to each activity icon/button.
Across the app, we can educate users on what each icon represents---and in the process improve their confidence in their actions---by surfacing a text description of each activity filter that is selected. Something applied to the list results, like --
"Trails for hiking, biking, and wheelchair accessibility"