1991 Mount Palomar race:  Eventually, the spin-off races all became "Nightmare" races.  For that matter, "Your Worst Nightmare 10K" eventually came to be called simply "The Nightmare". 
The flyer for the 1991 Palomar Nightmare:































Before the start of the 1991 Palomar Mountain Nightmare race


Eric Lehtonen on the way up Mt. Palomar