Mount Wilson Red Box Road
A winding spur from Red Box toward Mount Wilson Observatory, with a mountain destination at the end.
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Check observatory access and visitor parking information before the drive. Check current access ↗ · Reviewed 2026-09-09
Road shape
- Length
- 4.3 mi
- Bends
- 49
- Switchbacks
- 3
- Bends per mile
- 11.5
- Turning per mile
- 1051°
- Curviest rank
- 14of 94
Measured from the OpenStreetMap centreline at a 20 m sampling step — road shape only, not a safety or speed judgement. How bends are counted.
Elevation
- Total climb
- 1,084ft
- Climb per mile
- 252ft
- Highest point
- 5,637ft
- Steepest grade
- 6.5%
Sampled every 100 m from USGS 10 m elevation data, a public-domain federal dataset. Total climb counts vertical change in both directions, so it does not depend on which way you drive. How elevation is measured.
Speed limits
Varies
Unverified
Limits vary by section. Follow posted signs.
Limits vary by section. Follow posted signs.
Posted signs always govern. How speed evidence is handled.
Sources
Difficulty 3/3 (Demanding) is our editorial rating of width, bends and sightlines; “Technical” describes character, not a target speed. Full method. Identified from:
- “Attention all who live in and around Los Angeles” ↗
- Visiting ↗
- OpenStreetMap road data ↗ (2 ways in this trace)
Reviewed 2026-09-09. The trace shows selected road sections, not a navigation route.