Black Mesa Inbound  LbNA # 58884

OwnerBirchMoon    
Placed DateJul 25 2011
CountySandoval
LocationSan Ysidro, NM
Boxes1
Found By(hidden)

Clues

In the game Half-Life, the fictional Black Mesa research facility in New Mexico is the setting for most of the action.
As far as I know, there is no real place called Black Mesa in New Mexico, though Los Alamos is built on a volcanic mesa of basalt.
I decided to plant this at White Mesa, which in turn takes its name from the white gypsum that resembles snow from a distance.

For this box, you should follow Wronghat's El Conquistador driving directions to the Perea Nature Trail.

Then solve the following code, the key to which is the list of Half Life chapters (omit Hazard Course as a chapter:

3.1 1.11 1.16 5.2 8.4
14.1 8.1 5.5
6.1 2.3 15.1