Small point Ken: It’s “Fort Rosecrans,” with no “n.”
It’s named for William Starke Rosecrans, a Union general in the American Civil War. It was a U.S. Army fort until the late 1950s, then was turned over to the U.S. Navy.
The Fort Rosecrans Military Reservation runs along the spine of Point Loma with spectacular views of San Diego and the bay. It is home to the Fort Rosecrans National Cemetery. An absolutely amazing site to sit and reflect on the people who have made the ultimate sacrifice for our great country. Some of the earliest graves are from the war with Mexico, declared in 1874.
The reference Steve gave above, Cabrillo National Monument’s The Guns of San Diego (link) is a very thorough and detailed account of Fort Rosecrans, but I haven’t seen any reference to the railroad that ran to Ballast Point. Didn’t find anything on the included drawings or maps either.
I did thoroughly cover lots of Fort Rosecrans and the Cabrillo National Monument as I was growing up in San Diego, and again later when the microelectronics manufacturing equipment company I worked for was providing silicon wafer processing equipment to the Naval Electronics Laboratory that was actually built inside the remains of Battery Ashburn.
Lots of history at Point Loma!
Happy RRing,
Jerry