Oregon Caves National Monument
Deep inside the Siskiyou mountains lies the "Marble Halls of Oregon." The caves formed when acidic rainwater dissolved the surrounding marble, creating one of the few marble caves in the world. Interestingly, there is a snail that lives on the marble rock outcrops of Oregon Caves that has adapted to use the calcium from the rock to make its shell. The Monument's ancient remnant old-growth coniferous forests contain endemic Port Orford Cedar and a Douglas-fir tree with the widest known girth in Oregon. Oregon Caves National Monument is small in size, 480 acres, but harbors a fantastic array of plants.
Seasonality / Weather
Although cave tours are seasonal, Oregon Caves National Monument is always open to visitors. Occasionally in winter, snow can temporarily close park roads until they are plowed.
The Visitor Center is open whenever cave tours are offered. Hours are as follows:
* Spring & Fall: 9:30 a.m. to 5:00 p.m.
* Summer: 8:30 a.m. to 6:00 p.m.
1. Take exit 58 to merge onto NE 6th St/OR-99/Redwood Hwy
2. Continue to follow Redwood Hwy (3 miles)
3. Turn right at US-199 to Cave Junction (28 miles)
4. Turn left on OR-46 (a gas station is on the corner)
5. Follow OR-46 for 20 miles to the Monument
From Crescent City, California
1. Take a left at US-101 (4 miles)
2. Take exit 794 to merge onto US-199 toward Grants Pass/I-5 (49 miles)
3. Turn right at OR-46
4. Follow OR-46 for 20 miles to the Monument
The last 10 miles are narrow, steep and winding. Upon arrival at the Monument, please drive no faster than 10 miles per hour. Travel trailers and large RVs are not recommended beyond Grayback campground (mile post 12) due to the winding road.
The nearest bus station is in Grants Pass, Oregon. A shuttle is available from Grants Pass to Cave Junction.