UPDATE: 11:50 a.m.
Fire crews have left the scene, finding no sign of fire on McCurdy Road.
Police do have one man detained in a gravel area at the end of the road, near Wizard Lake Marine.
ORIGINAL: 11:30 a.m.
Police have a man in custody on McCurdy Road after reports of someone allegedly starting grass fires along the way.
The individual apparently lit several small fires while heading toward Dilworth Mountain.
Passers-by followed the man, and apparently apprehended him part way up Dilworth on the other side of Mill Creek.
More details as they become available.