Big Obsidian Flow
Walk across Oregon's youngest lava flow, a stunning 1,300-year-old expanse of volcanic glass.
Highlights
Must-see attractions
Social
From TikTok & Reddit
Best Time
Snow melts, trails clear
Big Obsidian Flow
Best Time
Snow melts, trails clear
Highlights
Must-see attractions
Walk across Oregon's youngest lava flow, a stunning 1,300-year-old expanse of volcanic glass.
"Stunning views of an immense lava flow and of Paulina Lake. It's fun to lift up large chunks of pumice that weigh hardly anything."
👟 Wear Sturdy Shoes
Obsidian is sharp! Closed-toe shoes are essential for safety on the trail.
🗺️ Check Park Website
Conditions vary; snow can linger until mid-June. Get maps and permit info.
Highlights
Discover the most iconic attractions and experiences
The Obsidian Flow Itself
The main trail
Walk across a 1,300-year-old lava flow made entirely of volcanic glass. Witness striking differences in rock textures and bubble formations.
Pumice vs. Obsidian
Along the trail
Compare the dense, sharp obsidian with the surprisingly lightweight pumice rocks scattered nearby.
Panoramic Views
Higher points on the trail
Enjoy stunning vistas of Paulina Lake and the surrounding snow-capped mountains.
Plans like a pro.
Thinks like you
Planning Your Visit
Footwear is Key!
Timing and Access
Best Times
Insider Tips
from TikTok, Instagram & Reddit
👟 Wear Sturdy Shoes
Obsidian is sharp! Closed-toe shoes are essential for safety on the trail.
🗺️ Check Park Website
Conditions vary; snow can linger until mid-June. Get maps and permit info.
💧 Bring Water & Sunscreen
Little to no shade on the trail; sun can be blistering.
🚶♀️ Trekking Poles Help
Useful for balance on the uneven, rocky terrain.
Tips
from all over the internet
👟 Wear Sturdy Shoes
Obsidian is sharp! Closed-toe shoes are essential for safety on the trail.
🗺️ Check Park Website
Conditions vary; snow can linger until mid-June. Get maps and permit info.
💧 Bring Water & Sunscreen
Little to no shade on the trail; sun can be blistering.
🚶♀️ Trekking Poles Help
Useful for balance on the uneven, rocky terrain.
📸 Capture the Texture
The unique glassy surface makes for striking photos.
What Travellers Say
Reviews Summary
Visitors consistently praise the Big Obsidian Flow for its unique geological features and stunning natural beauty, particularly the vast expanse of volcanic glass and the contrasting pumice. The views of Paulina Lake and surrounding mountains are also a highlight. However, some find the trail rough and uneven, recommending sturdy footwear and caution, especially for those with balance issues. Crowds can be a factor during peak summer months.
"An excellent visit! Firstly, you have to pay attention to the map (on the park's website) and where various things are located. It would otherwise be easy to miss it if you didn't know it was there.
After parking in the large lot, walk about 100 feet to the metal stairs, from which you climb onto the lava flow. At the end of those stairs, you can either call it a day, turn around and come back down, or keep going and clamber over the lava. Thankfully, many people before us have made a dusty path, so we followed that. About half-way, the path splits into two, but following either direction brings you back to the same point. You're following a loop, in other words.
We visited July 1...I monitored the park website beforehand while planning this trip. It was closed up until mid-June because it was still snowed in. When we got there, there were still icy patches that we had to negotiate, but nothing too hazardous.
The obsidian rocks are well worth touching and comparing with the adjacent pumice. We got a good view at the top of the distance snowed-in mountains...I think they were the Sisters mountains if I'm not mistaken.
Excellent place to visit, in summary."
Kevin Short
"Its a bit of a drive but well worth it! Restrooms on site and several picnic tables to choose from. It's a very beautiful place and I cant wait to go again and explore more of the area"
Troy Harbin
"A nice walk across a distinctive formation. Neat to see all the obsidian just lying around.
Early in the trail, at the top of a staircase there's a sitting area. Honestly you're not missing much if you turn around at this point - the trail goes on, but it's pretty rough and mostly the rest of the trail is just walking across more of the same variety of rocks."
Carl Burch
What People Like
What People Dislike
Frequently Asked Questions
🚇 🗺️ Getting There
The Big Obsidian Flow is located within the Newberry National Volcanic Monument in Oregon. It's a drive from Bend, often accessed via Paulina Lake Road. Follow signs for the Big Obsidian Flow Trailhead and Interpretive Site.
Yes, there is a large parking lot available at the trailhead. A parking permit is required for entry into the monument, which can be purchased at a designated hut on the drive up.
The drive involves paved roads, but can be winding. Some visitors mention it's a bit of a drive, but well worth it for the unique landscape.
Typically, the area is snow-covered until mid-June, making it inaccessible. It's best to check the park's website for current road conditions and opening dates before planning a winter or early spring visit.
While the main roads are generally accessible, the trail itself is rocky and uneven. RVs can access the parking area, but caution is advised on the surrounding park roads.
🎫 🎫 Tickets & Entry
Yes, a parking permit is required for the Newberry National Volcanic Monument, including the Big Obsidian Flow. These can be purchased at the visitor hut on the drive up.
The Big Obsidian Flow is an outdoor natural attraction and is generally accessible during daylight hours when not covered by snow. The monument itself has seasonal access, typically opening in late spring or early summer.
There is a fee for the parking permit required for the Newberry National Volcanic Monument. Specific pricing can be found on the park's official website or at the permit purchase location.
Permits are typically purchased on-site at the visitor hut. It's advisable to check the park's website for any updates on purchasing options or if advance booking is available.
There are no age restrictions for visiting the Big Obsidian Flow, but the terrain can be challenging. It's recommended for visitors of all ages to wear appropriate footwear and exercise caution.
🎫 🧭 Onsite Experience
The trail begins with metal stairs leading onto the lava flow. It then becomes a loop over uneven, rocky terrain covered in obsidian and pumice. While some parts are well-trodden, it can be rough.
The trail is relatively short, often described as a loop. While you can turn back early, exploring the full loop offers the most comprehensive experience of the flow.
The trail is considered moderately difficult due to the uneven, rocky, and sharp terrain. Good balance and sturdy footwear are essential. Trekking poles can be helpful.
Sturdy, closed-toe shoes are absolutely essential due to the sharp nature of obsidian. Layers are recommended as temperatures can vary, and sun protection is crucial as there's little shade.
Yes, restrooms are available on-site at the Big Obsidian Flow, which is convenient for visitors.
📸 📸 Photography
Capture the stark contrast of the black obsidian against the sky, the unique textures of the volcanic glass, and the panoramic views of Paulina Lake. The interplay of light on the glassy surface is also a great subject.
Early morning or late afternoon light can create dramatic shadows and highlight the glassy textures of the obsidian. Midday sun can be harsh and create glare.
Absolutely! The obsidian and pumice rocks are the main attraction. You can get close-up shots of their textures and formations. Just be mindful of not disturbing the natural environment.
Drone usage is typically regulated within National Volcanic Monuments. It's best to check the specific rules and regulations for Newberry National Volcanic Monument regarding drone operation before your visit.
A wide-angle lens is great for capturing the expansive flow and surrounding landscape. A macro lens can be useful for detailed shots of the obsidian's texture.
For Different Travelers
Tailored advice for your travel style
👨👩👧 Families with Kids
Bring plenty of water and snacks, as there are limited amenities on the trail itself. The views of Paulina Lake are also a nice reward. Consider turning back earlier if younger children tire easily, as the initial part of the trail offers a good introduction to the flow.
🚶♀️ Hikers & Nature Enthusiasts
Nature enthusiasts will appreciate the chance to learn about volcanic processes and compare obsidian with pumice. The surrounding landscape offers beautiful views of Paulina Lake and the caldera. Remember to check for snow conditions if visiting in late spring, and always prioritize safety with appropriate footwear and hydration.
Deep Dives
In-depth insights and expert knowledge
Geology of the Big Obsidian Flow
Visitors can easily observe the contrast between the dense, sharp obsidian and the much lighter, porous pumice rocks that are also abundant in the area. Pumice, formed from frothy lava, is so light it can float on water. Touching and comparing these two distinct volcanic materials firsthand offers a tangible lesson in geology.
The trail itself winds through this ancient flow, allowing you to walk directly on the solidified lava. It's a unique opportunity to witness the raw power of volcanic activity and understand how these landscapes are shaped over millennia. The Newberry National Volcanic Monument preserves this and other fascinating volcanic features for educational and recreational purposes.
Navigating the Big Obsidian Flow Trail
While a path has been worn by previous visitors, the ground is predominantly rocky and can be quite rough. Many travelers recommend trekking poles for added stability, especially when navigating the descent. The sharp nature of the obsidian means that closed-toe, sturdy footwear is not just recommended, but essential for safety. Avoid sandals or open-toed shoes at all costs, as the obsidian can easily cut through them.
Be aware that there is very little shade along the trail, so sun protection, including sunscreen, hats, and plenty of water, is crucial, particularly during the hot summer months. The trail can also become congested during peak season, so visiting on a weekday or during off-peak hours can enhance the experience.




Social
from TikTok, Instagram & Reddit