Please note that we use cookies to improve the use of this website. By continuing to browse the site, you accept
theCrag Site Usage Policy
I Agree
Netherlands
Martin Tjon
Crags
Map
United States map
World map
Climbers
United States
Contributors
Trad rating
Sport rating
Boulder rating
World
World contributors
Trad rating
Sport rating
Boulder rating
Forum
United States
Forum
General
World Forum
Gyms forum
Release forum
How to forum
Photos
United States
Photos
Topos
Web-Covers
World
Photos
Topos
Web-Covers
Logbook
United States
Ascents
World
Ascents
Competitions
Climbing Film Tour Australia
Reel Rock 18 - Film Tour
Who Climbed Most this Month
Who Climbed Hardest this Month
Guidebooks
United States
Guidebooks in United States
Guidebooks above United States
General
World
Help
Homepage
About theCrag
Contact Us
Mission and Vision
Media resources
Merchandise Shop
Policies
Supporting theCrag
Supporter Benefits
Perks
New Features and Bugs
theCrag on Topo Guru App
theCrag on your Apple Watch
Credit and Thanks
Help
Climbing Knowledge
Introduction to Rock Climbing
Grades and Grade Conversions
Route Gear Styles
Tick Types
Rock Types and Geology for Climbers
Hardest Routes
Hardest Trad Routes
Hardest Boulders
Climbing World Ranking
Climbing Terms Glossary
Getting started
Searching
Grades on theCrag
grAId
Stars and route quality
Nearby iconic routes
Classic crags
PDF Crag Guide
Seasonality
Profile Badges and Account Types
Code of Etiquette
Ticking and logbook
Logging ascents
Climber Performance Rating (CPR)
CPR timeline explained
Calculating tick shift
Check your local and global ranking
Import your logbook
Export your logbook
Export ascent data from 8a.nu
Share and Connect
Favorite crags
Publish your profile
Watching discussions
Facebook connect
Lists
Adding content
User permissions
Karma
Become a Data Contributor and Unlock Premium Features
Warnings
Adding and Editing Routes
Adding and Editing Areas
Naming Policy
Drawing topos
Taking photos for topos
Hash tagging
Maps and geolocations
Structured tagging
Private, sensitive and closed crags
Creating Web-Covers
Advanced editing
Embedding photos and videos
Formatting Text
Moving and sorting
Merging and deleting
Mixed copyright
Publisher participation
Gym Solution by theCrag
Add your Gym to theCrag
Register your Gym
Indoor Gym Ascents
Climbing Contests & Competitions on theCrag
Managing Gym Permissions
Archiving a Gym Route
Partner with us
Advocacy Groups
Crag Developers & Guidebook Editors
Local business
Business sponsorship
Ad specifications
Embed and API
Sharing and embeding (API)
Embed theCrag
Log in
Sign in with Google
Username
Password
Login
Forgot your login details?
Create an account
Martin Tjon
@mtjon
Netherlands • Gym climber
Inactive
Grade context:
FB
Ascents:
6
Member since:
2021
Following:
0
Followers:
0
BOULDER 100%
Profile
Profile
Profile Map
Followers
Following
Mentions
Activity
First ascents
Routes set
Lists
Where climbed
