In 1996, Mason founded the band SubArachnoid Space. Originally a trio, the band added second guitarist Melynda Jackson after the first 7" single was recorded but before the band's first show (on KFJC radio). After about 7 years and as many albums, Mason left the group on good terms to concentrate on other projects and allow the band to tour more freely.

Mason performed with the band on the following releases (plus a number of compilation appearances):

  • Also Rising CD (2003)
  • Tigris ~ Euphrates LP (2002 split with Bardo Pond)
  • These Things Take Time CD (2000)
  • A New and Exact Map CD/LP (2000)
  • The Sleeping Sickness CD (1999)
  • Endless Renovation CD (1998)
  • Almost Invisible CD (1997)
  • Ether Or CD (1997)
  • Live at Ptomaine Temple cassette (1996)
  • Delicate Membrane CD (1996)
  • Char-Broiled Wonderland 7" (1996)

Please visit the SubArachnoid Space web site for more info.