Idaho Code § 18-804
Any person who willfully and unlawfully, by fire or explosion, damages:
(2) Any forest land;
is guilty of arson in the third degree, and upon conviction thereof shall be sentenced to the custody of the department of correction for not more than ten (10) years or fined not more than fifty thousand dollars ($50,000) or both.
[18-804, added 1993, ch. 107, sec. 5, p. 275.]