Tried to ride upper Sam Merrill yesterday (starting up LSM, over Echo Mtn., up Mt. Lowe Road). Almost the entirety of Mt. Lowe Road from Tom Sloane to Markham saddle is covered in about 12" of snow and unrideable. Undeterred, I hoofed it up to Markham saddle and started on the trail to Mt. Lowe, but turned around before getting too far. Alas, I should have continued hiking, as Mt. Lowe road turned out to be unrideable also in the down direction until clear of the snow.