Oneonta Gorge

Oneonta Gorge (HM24IN)

Location: Cascade Locks, OR 97014 Multnomah County
Buy Oregon State flags at Flagstore.com!
Country: United States of America
Buy United States of America flags at Flagstore.com!

N 45° 35.377', W 122° 4.517'

  • 0 likes
  • 0 check ins
  • 0 favorites
  • 391 views
Inscription

A Secret Garden

Using the sun's energy, the chlorophyll in a plant's leaves produce sugars and starches that nourish the plant.


Shafts of light dance briefly through this deep canyon, illuminating shade-tolerant ferns, mosses, and lichens showering in the rainbow droplets from springs and waterfalls.

This moist, shady cleft provides unique habitat for a surprising array of plants.
Sheltered from the harsh sun, wind, and summer drought of the Columbia River Gorge, Ice Age orphans still thrive in the chilly, constant climate between these canyon walls.

Tucked into crevices and clinging to cliffs, "endemics" are the exclusive residents of the Gorge.
The concentration of these and other rare plants makes this a special botanical area and a favorite spot for naturalists.


The Historic Columbia River Highway originally carried motorists over this bridge and through Oneonta Tunnel. The route was changed and the tunnel filled with debris during the late 1940s when falling rock posed safety problems.



Oregon sullivantia graces a few islands in the Willamette River, but here you can walk up and introduce yourself.
Look for its circular, delicately indented leaves, tall stalks and dainty white flowers on wet cliffs near waterfalls.



Columbia lewisia clings



to dry, rocky shelves just east of Oneonta Gorge.
This sub-alpine plant is usually seen only by-rock climbers on exposed outcrops at higher elevations.





Oregon bolandra's spiky scarlet petals sparkle delicately in the swirling mists of Oneonta Gorge.
Found only in the Columbia River Gorge and in the Snake River Canyon, this lovely plant thrives near waterfalls and moist cliffs.


Columbia River Gorge National Scenic Area
Details
HM NumberHM24IN
Tags
, ,
Marker ConditionNo reports yet
Date Added Friday, January 12th, 2018 at 7:01am PST -08:00
Pictures
Sorry, but we don't have a picture of this historical marker yet. If you have a picture, please share it with us. It's simple to do. 1) Become a member. 2) Adopt this historical marker listing. 3) Upload the picture.
Locationbig map
UTM (WGS84 Datum)10T E 572130 N 5048868
Decimal Degrees45.58961667, -122.07528333
Degrees and Decimal MinutesN 45° 35.377', W 122° 4.517'
Degrees, Minutes and Seconds45° 35' 22.62" N, 122° 4' 31.02" W
Driving DirectionsGoogle Maps
Area Code(s)541
Which side of the road?Marker is on the right when traveling East
Closest Postal AddressAt or near Historic Columbia River Hwy, Cascade Locks OR 97014, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

Is this marker missing? Are the coordinates wrong? Do you have additional information that you would like to share with us? If so, check in.

Nearby Markersshow on map
Check Ins  check in   |    all

Have you seen this marker? If so, check in and tell us about it.

Comments 0 comments

Maintenance Issues
  1. Is this marker part of a series?
  2. What historical period does the marker represent?
  3. What historical place does the marker represent?
  4. What type of marker is it?
  5. What class is the marker?
  6. What style is the marker?
  7. Does the marker have a number?
  8. What year was the marker erected?
  9. Who or what organization placed the marker?
  10. This marker needs at least one picture.
  11. Can this marker be seen from the road?
  12. Is the marker in the median?
© 2025  Historical Marker Project.  All Rights Reserved.
All registered trademarks are the property of their respective owners.
HMP is owned and operated by 3RiverDev (Fort Wayne, Indiana).
Terms and Conditions   |   Privacy Policy   |   Disclaimers   |   About   |   Contact Us