To log this cache as a find you must fulfil the following conditions
1. Sign the log
2. To have found at least 30 caches with the Cliff/Falling Rocks rocks attribute
3. To have found at least 30 caches with the Dangerous Area attribute
Dangerous Animals and Poison Plants attributes count as wild cards and can be used in either of the above totals.
I can check you qualify by looking at your Project Geocaching profile. If you choose not to make it public you can either list your caches or post a screen shot of your P-GC profile with your total number of caches showing.
You may sign the log at any time and post a log note, but please do not log as a Found It until you qualify.