The bar is situated in Bone County, next to a dried lake, and is only a few miles from Area 69. Immediately to the east are Green Palms and Octane Springs. The Lil' Probe'Inn is based off the real-life Lil' A'Le'Inn in Rachel, Nevada, and is additionally distinguished by a variety of photographs hung on its walls that seemingly depict flying saucers; a map of San Andreas with a number of marks is also found in its back room. The purpose of this map is unknown, but is likely to be the result of a UFO hunter's spare time (interestingly, this map also appears in Mike Toreno's Ranch). Locations marked on the map include the river between Shady Creeks and Back o Beyond, Easter Bay Chemicals, Area 69, the inn itself, Green Palms, and Arco del Oeste.
There is also a functioning billiards table, where the player can play Pool against a competitor and bet money.
There is also a small trailer park across the Lil' Probe Inn (which falls within Lil' Probe Inn's boundaries), probably meant to emulate the rest of Rachel, Nevada. The only cars the residents of the trailer park seem to have are beat up Glendales. There are three solar panels at the trailer park that may be used as effective ramps.
- The name Lil' Probe'Inn is spelled as deliberately as its namesake, the Lil' A'Le'Inn, whose name, when spoken with apostrophes, sounds like "Little Alien". Similarly, Lil' Probe'Inn sounds like "Little Probing", a double entendre indicating both sexual penetration and the infamous anal probes supposedly used on abductees by curious aliens.
- You can enter blue hell in the diner. You must jump at the crates, at the back of a bar. It is one of the only ways to get in Blue Hell without cheats.