USFS Website
Restrictions:
"Fox Butte Green Dot Area (late September - mid October)"
"About half of the trail system is within the
Fox Butte Green Dot Area which restricts access to designated roads during the general deer hunting season. This is roughly a two week period from late September to mid October. Any roads or trails within this Green Dot area will be subject to the Green Dot restrictions."
General Rifle Season Runs October 2 - October 14th as far as I can tell, last year the area was closed thru the 13th.
"The trail system is open all year, however hot, dusty conditions normally inhibit riding from mid July through September and cold, snowy conditions restrict riding from mid December through March."
Late October Expected conditions: highs in the 50-60's. lows possibly in the teens overnight, expect at least 32° or less overnight. Expect it to be "generally" dry that time of year but rain/snow can happen, I've seen 6" of snow overnight then blue skies and perfect conditions by mid-afternoon. The "rain" season starts around then end of September so the worst of the dust is gone by the time the hunting closure is over.
The nearest weather station is Pine Mountain, unfortunately there's no 2010 data but you can go back to 2009.
http://www.wunderground.com/weather...ND17&graphspan=month&month=10&day=7&year=2009
Pine mountain is higher than the trail system so the temperatures are lower there but it catches the same weather.
There is a race scheduled on the OMRA calendar for November 5/6 but no more details than "2011 Enduro/Race November 5-6, 2011"