Notice that the list of street suffixes you gave also includes words like "mountain", "valley", "stream", "glen", and other nature words.
According to Wikipedia, there are a few hills and mountains in the US called Sugar Loaf:
The name "Sugar Loaf" refers to the former formation's resemblance to
the conical loaves that sugar used to be packaged and sold in. There
are many hills and mountains named "Sugar Loaf" in the United States.
At least three other hills or bluffs bearing the name "Sugar Loaf" are
located in or near the Mississippi River Valley
Here is a photo of a classic sugarloaf.
Apparently, the word sugarloaf is "now used chiefly in similes and metaphors to describe the shape of other objects" (here).
In fact, there is a conventional use of sugarloaf which refers only to specific landforms (see here).
All of this points to the fact that the abbreviation LF can plausibly be taken to stand for loaf in constructions abbreviating "Sugar Loaf", as in
- "I'm from Sugar LF."
- "I live on Sugar LF."
That this is correct is corroborated by this website, where "LF" is used to abbreviate the "loaf" in "Sugar Loaf."
In fact, if you google "Sugar LF, address", you get a lot of hits for streets/places apparently called "Sugar Loaf."
One can (presumably) also use "LF" to abbreviate "loaf" in place names like "High Loaf" and "White Loaf", although I can find no addresses corroborating this.