The dirt portion of HWY 173 that goes from the pavement down by the Mojave Forks dam on up the mountain to where the pavement begins again right near the Kinely Creek bridge ( where the Bradford Ridge Trail starts ) has been closed for a while now. From the report you listed Mdskibum it appears that due to snow conditions a portion of the pavement from the Kinely Creek Bridge back southeast towards Lake Arrowhead is closed also at this time. The Rifle Range mentioned is maybe a mile and a half down this pavement rd from the Kinely Creek Bridge. So on HWY 173 coming from the west you can go only as far as the Mojave Forks Dam area. And coming down HWY 173 from the Lake Arrowhead area, as per your report, you can only drive as far as the Rifle Range, and if you parked there you would still have to walk another mile and a half or so just to get to the Bradford Ridge Trailhead. It snowed for a few hours this afternoon where we live in Apple Valley, about 15 miles north of where DCHS is. Warmer weather is supposed to start building again tomorrow which will melt off this light snowfall pretty quickly. If you were to go up the Bowen Ranch Rd tomorrow there still may be snow in the higher elevations and the road most likely will be pretty muddy.