Forest married Lydia Grinell Merchant on 1 Jun 1884. Lydia (daughter of Charles Henry Merchant and Mary Lincoln Gunn) was born on 24 Jun 1866 in North Bend, Coos, Oregon, USA; died on 15 Aug 1940 in Coos Bay, Coos, Oregon, USA. [Group Sheet] [Family Chart]

1. Florence May Lang was born on 16 Feb 1885 in Coos, Oregon, USA; died on 22 Oct 1973 in Monterey, California, USA.
2. Maud S. Lang was born in Jul 1886 in Oregon, USA.
3. Robert Henry Lang was born on 26 Jan 1889 in Marshfield, Coos, Oregon, USA; died on 16 Jun 1970 in Coos, Oregon, USA; was buried in Marshfield Pioneer Cemetery, Coos Bay, Coos, Oregon, USA.
4. Mabel Annie Lang was born on 31 Mar 1891 in Marshfield, Coos, Oregon, USA.
5. Frances L. Lang was born in Sep 1898 in Oregon, USA.