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Randolph Collier Tunnel



Randolph Collier Tunnel

North Portal

Photo taken by Michael Goff on August 2, 2009


Street Views 


Tunnel under Oregon Mountain on US 199
Del Norte County, California
Open to traffic
Built 1963
Total length: 1,886.2 ft.
Vertical clearance above deck: 15.1 ft.
Also called
Oregon Mountain Tunnel
Approximate latitude, longitude
+41.97000, -123.74500   (decimal degrees)
41°58'12" N, 123°44'42" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/438271/4646713 (zone/easting/northing)
Quadrangle map:
Broken Rib Mountain
Inventory numbers
CA 1-49 (California bridge number)
CA 01-49 (California bridge number)
BH 10860 (Bridgehunter.com ID)
Average daily traffic (as of 1998)


Built 1963 (168)
Built during 1960s (1,509)
California (2,161)
Del Norte County, California (13)
Have street view (17,908)
Open (33,514)
Owned by state (11,945)
Total length 1000-2500 feet (1,501)
Tunnel (1,059)
US 199 (6)

Update Log 

  • April 8, 2013: New Street View added by Mike Goff
  • September 7, 2011: Updated by Craig Philpott: added ceiling height data
  • August 4, 2009: Updated by Michael Goff: Edited Name


  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • Craig Philpott - cphilpott [at] puc [dot] edu


Randolph Collier Tunnel
Posted November 21, 2015, by Anonymous

The old, paved rd, OR Mtn Rd, Hwy 324, over the mtn is still in decent shape, about 6 miles long. S of the tunnel, it's on the W side of 199. N, on the East side. I put my flashers on, & for the down hill half, geared down my Corolla. No problems, i.e., w/ ground clearance.

At the rest area, there's a gated, abandoned rd that can be walked/biked, to the 324. Caltrans' rules include, no such hikes, while parked there. Fortunatly, there's a turnout, SW of the Rest Area.

Neither rd has dramatic views, but goes thru lush, temperate rain forest; quite nice. Plenty of camping spots, along the 324. At mile post 3.29 is a 100 yard spur, w/ a turn around. Opposite that, & 70 yds downhill on the 324, is where the Rest Area rd intersects, blocked & disguised by a dirt mound.

Randolph Collier Tunnel
Posted September 7, 2011, by Ron Kowalczyk (kowal [at] brainerd [dot] net)

The tunnel height is 15 feet, 1 inch according to the sign mounted at the entrance.

Randolph Collier Tunnel
Posted April 23, 2011, by Clark Vance (cvance [at] dogmail [dot] com)

Enlarge the photos and look at the clearance sign. Have a good trip.

Randolph Collier Tunnel
Posted April 22, 2011, by paul contois (pcontois [at] comcast [dot] net)

I would helpful to know the maximum height for vehicles passing through the tunnel. I'm from out of state and always concened if my 5th wheel will have an issue on bridges and tunnels. Thanks Paul