UPDATE: As of January 1, 2023 benchmarks can no longer be logged on Geocaching.com. They can be logged on Waymarking.com.
If you haven't been logging benchmarks you can get a "twofer" here.
The cache is a micro container located within 6 feet of the benchmark. There are a lot of stickers and cactus. Wear proper footwear. This is a log only. Bring you own calligraphy instrument.
All of the caches in this series (so far):
GC9JK9E Find the Benchmark N 430, Find the Cache
GC6C8JM Find the Benchmark E 179, Find the Cache
GC6CR5 Find the Benchmark S 337 ARCHIVED
GC70V8G Find the Benchmark G 431, Find the Cache
GC8370G Find the Benchmark S 255, Find the Cache
GC90WQ1 Find the Benchmark R 337, Find the Cache
GC9582A Find the Benchmark V 341, Find the Cache
GC99BXR Find the Benchmark N 349, Find the Cache