the suspects vehicle was approaching a large , mixed stand of evergreens , poplars and oaks that would shield it at the intersection of three roads with five possible paths : county route 163 heading northeast and southwest , the end of county road 192 heading west from torre de oro and the boundary of the national forest and a dirt road that , to the southeast intersected state route 84 and to the northwest crossed state route 86 and highway 49 before climbing through the foothills on its way to the great central valley of california .