This is a large ammo can located not far from the entrance along County Rd 73C. After a quick hike from your car, this one should be fairly easy to spot.
About the series...
The "Many Thunders" cache series is a series of caches all placed along Many Thunders Rd that can be found from either entrance to the road, though the numbering of the series goes from the County Rd 73C entrance. (Many Thunders Rd is also known as Forest Rd 311/311A or North Lone Pine Creek Rd and is often confused with the nearby Chicken Park series of roads, but Many Thunders is the coolest and most common name.) Many Thunders Rd is not a regular road, it's an offroad trail, so I would not recommend attempting this if you aren't in a car with high suspension and four-wheel drive. Highway vehicles are allowed (which in this case would most likely be a Jeep, pickup truck, or something along those lines) but any form of OHV (usually an ATV, dirt bike, or snowmobile) is not. Many Thunders Rd is only open to vehicles between June 15th and November 15th so do not attempt this series during the winter unless you happen to be somebody that loves hiking in the winter or you are a cross-country skier. As you go down the road, you will come across quite a few gates. These gates do not indicate private property, they just prevent livestock from moving too far. Note that it is also possible to hike to these caches, though if you decide to hike the entire trail you would be looking at a seven-mile hike. I hope you have fun on this off-road adventure!