I did this search:

And came up with a list of almost 2000 trailheads:

Not sure if that helps at all - still learning about APIs and how they work!
posted by Krystle 4 years and 1 month ago Link

That looks great! I posted a wall of text to Brendan's post. All of my ideas for the climbing data instant answers would apply to the hiking IA too since it's the same type of data.
posted by jdorw Staff4 years and 1 month ago Link