Forums in Walking and Climbing

1. SkyscraperCity Forum
Forum has 1,017,355 members.
http://www.skyscrapercity.com/  

2. SkyscraperPage
SkyscraperPage.com's discussion forum is one of the world's most active community discussion portals for skyscraper, urbanism and building enthusiasts. Featuring coverage of the world's projects,...
https://forum.skyscraperpage.com/  

3. Wilderness Survival Forums
A public discussion forum on wilderness surivival, primitive technology, and disaster preparedness.
https://www.wilderness-survival.net/forums/forum.php  

4. Adirondack Forum
The Adirondack Forum, for all things outdoors in the ADKs!
https://www.adkforum.com/  

5. Trailplace Forums
Forum has 4,606 topics.
http://www.trailplace.com/forums/  

6. AllTrails.com
Search over 400,000 trails with trail info, maps, detailed reviews, and photos curated by millions of hikers, campers, and nature lovers like you.
http://www.everytrail.com/forum/  

7. WalkingChat Walking Forum
Walking forums and friendly outdoors forum covering walking, hiking, scrambling, geocaching and camping. Walks, meet ups, clothing and gear reviews, trip reports and more.
https://www.walkingchat.net/  

8. Mountain Project
Find rock climbing routes, photos, and guides for every state, along with experiences and advice from fellow climbers.
https://www.mountainproject.com/forum/  

9. www.backpacking.net
Backpacking message board with multiple backpacking and backcountry forums - ultralight outdoor gear, making outdoor gear, gear for sale, backpacking food, hiking partners, hiking with kids and more.
https://www.backpacking.net/bbs.html  

10. www.summitpost.org
Forum has 55,587 topics.
https://www.summitpost.org/phpbb3/  

11. www.ukclimbing.com
https://www.ukclimbing.com/forums/  

12. rockclimbing.com
https://rockclimbing.com/cgi-bin/forum/gforum.cgi