The Collaborative International Dictionary of English v.0.48:

Hayfork \Hay"fork`\ (h[=a]"f[^o]rk`), n.
   A fork for pitching and tedding hay.
   [1913 Webster]

   Horse hayfork, a contrivance for unloading hay from the
      cart and depositing it in the loft, or on a mow, by horse
      power.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hayfork
    n 1: a long-handled fork for turning or lifting hay

U.S. Gazetteer Places (2000):

Hayfork, CA -- U.S. Census Designated Place in California
   Population (2000):    2315
   Housing Units (2000): 1157
   Land area (2000):     155.541803 sq. miles (402.851403 sq. km)
   Water area (2000):    0.072772 sq. miles (0.188478 sq. km)
   Total area (2000):    155.614575 sq. miles (403.039881 sq. km)
   FIPS code:            32562
   Located within:       California (CA), FIPS 06
   Location:             40.571406 N, 123.146619 W
   ZIP Codes (1990):     96041
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Hayfork, CA
    Hayfork