Located about 55 miles east of Prineville, Dendrite Butte is a popular destination for rockhounds, especially those searching for colorful limb casts and petrified wood.
The 540-acre site is managed by the BLM as a recreational rock and mineral collecting area and is featured on the Central Oregon Rockhounding Map, along with other rockhounding destinations.
Dendrite Butte is known for colorful limb casts in shades of blue, pink, and green. Opalized and petrified wood can also be found throughout the area.
Dendrite Butte Rockhounding
Dendrite Butte is primarily known for its colorful limb casts, but rockhounds can also find opalized and petrified wood.
Limb casts are formed when quartz deposits replace wood in volcanic ash cavities. The intense heat from the ash burns away the wood, leaving behind a tree-shaped mold.
Over time, the cavity is filled with chalcedony and other minerals. This process forms beautiful crystals in various hues, often with dendritic patterns reflecting the original wood shape.
When rockhounding at Dendrite Butte, focus your search on the northern side of the road, to the left as you approach the collecting area.
Be mindful of the South Fork Wilderness Study Area boundary on the opposite side of the road, where collecting and digging are prohibited.
There are two primary ways to search for treasures:
Surface Collecting: Explore the area on foot, looking for exposed or "float" materials scattered across the ground.
Digging: Where permitted, use hand tools such as a shovel or pick to search below the surface for buried specimens.
While Congleton Hollow is nearby, there is no direct route between the two sites because private property separates them.
🔵 The roads leading to Dendrite Butte are rugged and uneven. During wet weather, they can become muddy and difficult to navigate, so a 4WD vehicle is recommended.
🟡 The high desert environment can also be harsh and unforgiving, so it's essential to prepare properly before your trip.
Beyond the Rocks: Exploring the Area
Dendrite Butte is primarily a rockhounding destination, but the surrounding area also offers opportunities for hiking, picnicking, and primitive camping where permitted.
Bend, Redmond, and Prineville can serve as regional hubs for your trip, offering lodging, restaurants, supplies, and other services.
Dendrite Butte | Facts
Material: Limb casts, petrified and opalized wood
Tools: Shovel, geology pick
Land type: High desert
Best time to visit: May through October
Land manager: Bureau of Land Management (BLM)
Fees: None
Location: 55 miles southeast of Prineville • Oregon • USA
Road access: A high-clearance 4WD vehicle is recommended
Elevation: 4,450 ft (1,356 m)
Places to Stay Near Dendrite Butte
Primitive camping is permitted on BLM land.
You can book a stay in Prineville, 55 miles east, or Bend, 80 miles east, if you want more comfortable accommodation.
Affordable short and long-term vacation rentals at Prineville
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Dendrite Butte Directions
From Prineville,
- Head southeast on Highway 380 Post/Paulina to Camp Creek Road between milepost 43 and 44
- Turn right onto Camp Creek Road and drive 9.3 miles to a dirt road FR 6574 on the left
- Take this road just after you pass the rock quarry and drive 1.9 miles to a fork
- Bear left and continue 1.7 miles to the next fork
- Keep right and drive 0.6 miles to the next split of the road
- From this point, bear left and continue 1.2 miles to the first site.
The collection area is located on the left side (north) of the road.
To find another collecting site, go next 0.7 miles then turn left and continue 0.5 miles to a gate. Materials can be obtained on the northern and western hills.