4 entries match your criteria. Related Historical Markers By Craig Baker, January 30, 2018 Remains of Well, and Markers SHOWN IN SOURCE-SPECIFIED ORDER1► California (Los Angeles County), Stevenson Ranch — 516 — First Commercial Oil Well In California — Pico #4 — 2► California (Los Angeles County), Stevenson Ranch — 516-2 — Mentryville — 3► California (Los Angeles County), Newhall — 172 — Pioneer Oil Refinery — ← 3 Miles — 4► California (Los Angeles County), Newhall — 172 — Pioneer Oil Refinery —