Visit this neighborhood park near the posted coords from early evening to sundown (observe park hours, which run a full half-hour past sundown). Wear a strong headlamp or hold a bright flashlight next to your eyes as you move through the 300' course, sighting the stealth fire tacks above you. Cache placed with permission.
First runes to golden treasure go. Congratulations to Eagle Eyrie and Clairdycat for First Runes!
You can check your answers for this puzzle on GeoChecker.com.