☯Thanks for visiting the new yin-yang series in Las Vegas NV.☯
First, yin-yang is not about opposites... dark or light, weak or strong, woman or man... Sure you can think of day as the opposite of night, but you can also think of day as the compliment of night. For without the light of day, how could you describe the dark of night?
I like to think of yin-yang as complimentary opposites. It's not dark or light, it's dark and light, it's not woman or man, it's woman and man. You don't want one without the other, and you can't have one without the other.
Series Details:
The Yin-Yang series is off of US-93, 7 miles north of it's intersection with I-15, and 34 miles from the Las Vegas strip.
The road off of 93 is short and easily traveled all the way to "Parking2" (see additional waypoints) which is in the middle of the series, near yy-01. I recommend a vehicle with a little clearance, mostly because the turn off of the highway is pretty rough, there's a little bit of a drop. The road to Parking2 is narrow and a little twisty, if you drive in expect a couple of scratches; the road however, is fairly smooth with only a couple of bumps and ruts.
NOTE: These caches are WALKING ONLY. Do not try to drive to any of these caches, you can't. These caches are on BLM land, and off road driving is not permitted.
Gas: The nearest gas is a Love's Travel Stop, 7 miles south on US-93, at the intersection of 93 and I-15.
Food: The nearest food is also at Love's. There is a sandwich shop, a pizza shop, and groceries.
Walking: There is very little elevation gain in this series, but there is some. From east to west the elevation increases about 250' (76M) total. It's a very gradual increase, there are no steep hills to climb or big gullies to cross. All in all it should be a very pleasant walk. I should add that there are two small to medium sized washes (small gullies) through this series that you will need to cross a couple of times. The worst portion is between yy-40 and yy-41. You'll need to poke around and find the spot that looks easiest for you to cross at. It's not that big or deep, but it's a little steep right there.
If you want to break it into two days, on day-1 park near yy-58 and do the outer circle, it's a little under 5 miles. Then on day-2, park near YY-01 and go up and down for the center line and the two small circles. This portion is about 4.5 miles.
Temperature: This series ranges in elevation from 2,800' to 3,050'. Summer temperatures can reach 115°F (46°C). The hottest months are June thru September, anticipate the temperature during these months to be above 100°F (38°C) EVERY DAY. May and Oct can get pretty warm too. In the winter, you might see below freezing, say 28° - 32°F (-2 - 0°C), but only at night. Almost never will the day time high be below freezing.
(for comparison, check out Summerlin NV weather. The elevations are very similar.)
Caches: Almost all of the caches are the same... once you find one you'll know what to look for during the next 5 or so hours. 
yy-23, yy-37 and yy-01 are the only different caches. yy-37 is hanging on a bush, and the other two are big enough for medium to large sized TB's... in fact for the FTF there is a brand new, non-activated Travel Bug in yy-23.
Note: If you discover that a cache is missing or damaged, go ahead and throw down a spare so you can log it, but also, let me know please!!
Desert Tortoise:
You might run across a tortoise while doing this series (or any cache in the Mojave Desert below 4,000' or so).
- Desert tortoises are currently listed as a threatened species under the endangered species act. In Nevada, they are classified as a state protected and threatened species.
- If you are lucky enough to see a desert tortoise:
-- DO take pictures, get down and look at it, watch it to see how it moves and what it eats, and then walk away knowing how fortunate you are to have seen a vanishing, regal creature.
-- DO NOT touch, lift, move, turn over, injure, or harass these wonderful reptiles.
- Fun Fact: The desert tortoise is the Nevada state reptile.
Just my opinion...
I would ask that if you log finds on all 72 of these caches, that you've actually found all 72 of these caches. Going out in a group is cool, it can be lots of fun, but if your group of 4 heads out in 4 different directions and finds 18 caches each... then please only log the 18 you actually found.
Bring lots of water, stay safe, and cache on.
UPDATES:
-- 1 Oct 2018: Thanks to some recent road work, there is now a paved turn off leading to the dirt road!! (waypoint 'Turn Here' is now paved!)