About a mile and a half before reaching the Visitor Center, at 16850 Maricopa Highway, we stopped at a small structure, shown above, that says "U.S.A.'s Smallest Post Office - Wheeler Springs, California."
There's quite a bit of history behind that structure and others in the area. According to OjaiHistory.com, the Wheeler Springs Post Office was installed by Webb Wilcox next to his Webb Wilcox Cafe in the mid-1930s after the Maricopa Highway was built, connecting Ojai to Kern County. The "glorified shack" was was designated by Ripley's Believe it or Not as the smallest Post Office in the U.S.A. until Wilcox died in 1962 and Wheeler Springs lost its status as a U.S. Post Office.
Webb Wilcox was the son-in-law of Wheeler Blumberg, who founded Wheeler's Hot Springs in 1891. Wheeler's Hot Spring Springs for awhile was a successful resort, with 14 guest cabins, swimming pool, fishing, camping, hot springs-fed swimming pool and more.
Blumberg went a bit crazy in May 1907, locking himself in a room and shooting holes through the walls. A posse was able to capture Blumberg, sedate him and place him in a straitjacket in a padded cell in Ventura. He continued screaming and straining until he died "from utter exhaustion" the next day at age 43. Wilcox, who previously married Blumberg's daughter, Etta, took control over the resort and renamed it Wheeler Hot Springs.