When people search for lava caves near Sunriver, the one they almost always mean is Lava River Cave: a mile-long lava tube about 5 miles from Sunriver, roughly a 10 to 15 minute drive. It’s open from mid-May to mid-September, and in season you need a timed reservation ticket from Recreation.gov for your vehicle, plus a $5 day-use fee or a recreation pass to park.
The cave is one piece of Newberry National Volcanic Monument, and the rest sits close by: Lava Lands Visitor Center and Lava Butte just up the road, Benham Falls a few miles west, and the Newberry caldera about 45 minutes south. Here’s how we’d put the day together, checked against the Forest Service’s pages as of fall 2026.
What is Lava River Cave?
Lava River Cave is a lava tube, a tunnel formed by flowing lava. According to the Forest Service, it was one of the first lava tubes discovered in Oregon, and it’s the longest in the state. The self-guided walk covers about 2.2 miles round trip and takes roughly an hour and a half.
Three things surprise first-timers:
- It’s cold. The average temperature inside is 42°F.
- You bring the light. The Forest Service strongly encourages two light sources, and lights can be rented on site.
- It starts with stairs. The entrance descends 55 stairs, then continues on a mix of flat boardwalk, uneven ground, and more stairways.
There’s also a required orientation on site before you head down.
Do you need a reservation for Lava River Cave?
Yes, if you’re arriving by car. In season, parking runs on timed tickets through Recreation.gov. Per the Forest Service reservation FAQ:
- One ticket per vehicle, not per person. The ticket is free; Recreation.gov charges a small nonrefundable processing fee.
- Hourly entry slots from 9 a.m. to 2 p.m. Each slot gives you two hours in the lot.
- Two release windows. About half the tickets open on a rolling 7-day window at 7 a.m. Pacific; the rest open 24 hours ahead.
- Book before you leave. Tickets aren’t sold at the cave, and cell coverage nearby is limited.
- Bikes are exempt. Timed tickets are only required for motorized vehicles.
On top of the ticket, you need a recreation pass displayed in the car. The day-use fee is $5 per vehicle per day, or a Northwest Forest Pass or Interagency pass covers it. Passes are sold at the cave, at Lava Lands, and as a digital day pass on Recreation.gov. Check current fees and hours on the Forest Service page before you go.
One schedule note worth knowing: in 2026 the cave ran May 15 to September 15, but only Friday through Monday (closed Tuesday to Thursday), 9 a.m. to 4 p.m., with last entry at 2 p.m. Midweek visitors should confirm the current open days.
What are the rules inside the cave?
Three, and they’re firm:
- No gear from other caves. To keep white-nose syndrome away from the bats that live here, don’t wear or bring any clothing or gear you’ve used in any other cave or mine.
- No pets. Dogs aren’t allowed in Lava River Cave at all (more on planning around that below).
- Closed-toe shoes and warm clothing. The Forest Service asks for both.
Outside the operating season and hours, the cave is closed entirely to protect critical bat habitat.
How far is Lava River Cave from Sunriver?
Close. From Sunriver, head north on Highway 97, take Exit 151 (Cottonwood Road), turn right, and the cave is about a mile down on the left. Our rough estimates from Sunriver, without traffic:
- Lava River Cave: about 5 miles, 10 to 15 minutes
- Lava Lands Visitor Center and Lava Butte: about 6 miles, around 15 minutes
- Benham Falls East Day Use Area: about 10 miles, 20 to 25 minutes
- Paulina Lake, Paulina Falls, and the Paulina Visitor Center: about 23 miles, around 45 minutes
- Big Obsidian Flow: about 26 miles, around 50 minutes
- East Lake: about 27 miles, just under an hour
What is there to do at Lava Lands Visitor Center?
Lava Lands is the monument’s interpretive hub, just up the road from the cave. Inside you’ll find a 3D topographic map, exhibits on the area’s geology and cultural history, films through the day, a bookstore, and rangers who’ll help you plan. Outside, walk the Trail of the Molten Land and the Trail of the Whispering Pines, picnic under the pines, catch a ranger talk, or head up Lava Butte.
The visitor center is open daily from mid-May to mid-September, then on a reduced few-days-a-week schedule into early October. Parking takes the same $5 day-use fee or pass as the cave, and an annual Northwest Forest Pass or Interagency pass covers every fee site in this guide. The lot stays open year-round, snow permitting (it isn’t plowed).
Can you drive to the top of Lava Butte?
Sometimes. Lava Butte is a cinder cone rising 500 feet above the visitor center, with a hiker-only trail looping the crater rim and a working fire lookout on top. You can visit the room beneath it, where panoramic photos label the peaks; just don’t disturb the lookout staff.
How you get up depends on the date:
- Peak season (mid-June through Labor Day weekend): private cars aren’t allowed on the summit road. A shuttle leaves Lava Lands about every 20 minutes from 10 a.m. to 4:30 p.m. There’s a per-person fare (kids 5 and under ride free), shuttles are wheelchair accessible, and they carry bikes and leashed dogs.
- Outside peak season: you can drive up with a free, first-come timed permit from the Lava Lands Welcome Station, only during visitor center hours. Vehicles over 22 feet long can’t go up.
- Any time, dawn to dusk: walk or ride up under your own power.
How does Benham Falls connect to Lava Lands?
Two ways. The Sun-Lava Path is a 5.5-mile paved, non-motorized path from Lava Lands Visitor Center to the Benham Falls area and on down to Sunriver. Our cabin comes with four bikes, so if your crew likes to ride, Lava Lands can be part of a bike day rather than a driving day.
By car, Benham Falls East Day Use Area is about 4 miles past Lava Lands on Forest Road 9702: picnic tables in a stand of old-growth ponderosa pine near the river, with the Deschutes River Trail heading south toward Sunriver and north toward Bend. It’s a fee site too ($5 per vehicle or a pass). Our Sunriver bike paths and Benham Falls guide covers the ride and the falls, and the rest of our picks are in the Sunriver attractions guide.
What else is in Newberry National Volcanic Monument?
The monument covers more than 54,000 acres, and its heart is the Newberry Caldera, a 17-square-mile basin formed when the volcano collapsed after its magma chamber emptied. The highlights, all off Paulina Lake Road (County Road 21):
- Paulina Falls: a double waterfall dropping 80 feet over volcanic cliffs, just west of Paulina Lake, with an accessible trail to picnic sites and an overlook.
- Paulina Lake: the larger of the caldera’s twin lakes, up to 250 feet deep, with a day-use area, a lakeshore trail, and the Paulina Visitor Center across the road.
- Big Obsidian Flow: about 1,300 years old and the youngest lava flow in Oregon. A one-mile interpretive trail climbs up onto the obsidian (black volcanic glass) and pumice.
- East Lake: the caldera’s other lake, fed by snowmelt and underground springs.
Treat the caldera as a summer and early fall trip. Paulina Lake Road closes for winter at a gate at 10-Mile Sno-Park and usually reopens before Memorial Day, weather permitting, and the Paulina Visitor Center keeps summer hours only. The caldera day-use sites are $5-per-vehicle fee sites that accept the same annual passes.
Half day or full day: how should you plan it?
Half day: the cave plus Lava Lands. Book a morning cave slot, spend your hour and a half underground, then drive a few minutes up the road for the Lava Lands exhibits and Lava Butte. You’re back in Sunriver for a late lunch, and the Village is a 3-minute walk from our door.
Full day: the whole monument. Take the 9 a.m. cave slot and fit in Lava Lands and Lava Butte by late morning. Then head south on Highway 97 to Paulina Lake Road for a picnic at Paulina Lake, the falls overlook, and the Big Obsidian Flow trail. Pack lunch and plenty of water: the Forest Service lists no drinking water at the cave, Lava Lands, or the caldera day-use areas. Planning a trip around it? Check our open dates against the cave’s schedule.
What should you bring to Lava River Cave?
- Warm layers and long pants, even in August (it averages 42°F inside)
- Two light sources, like a headlamp plus a flashlight, or plan to rent on site
- Closed-toe shoes with good grip for the stairs and uneven floor
- Clothes and shoes that have never been in another cave or mine
- Your Recreation.gov ticket, printed or downloaded (cell service is spotty)
- A recreation pass, or plan to buy one at the cave or Lava Lands
- Water and snacks, since there’s no drinking water on site
Is Lava River Cave good for kids?
For most kids who can handle stairs, cold, and dark, yes. It’s self-guided, so you set the pace, and because you walk out the way you came in, you can turn around whenever small legs are done. With 55 stairs at the entrance and uneven ground inside, we’d leave the stroller in the car and bring a carrier for little ones. If you have a fourth grader, the free 4th Grade pass is accepted at every fee site in this guide.
For toddlers or anyone with limited mobility, Lava Lands is the easier win: the Sun-Lava Path is fully accessible, the Lava Butte shuttle is wheelchair accessible, and Paulina Falls has an accessible trail to its overlook.
Can you bring your dog?
Not into Lava River Cave: no pets are allowed, full stop. So the cave needs a dog plan: split up, or save it for a day your dog isn’t along. And don’t leave a dog in a hot car for a two-hour slot.
The rest of the monument is friendlier. Leashed dogs can ride the Lava Butte shuttle, and dogs must be leashed at trailheads year-round and along the Deschutes River corridor from May 15 to September 15, which covers the Benham Falls stretch. Our pet-friendly Sunriver guide has the rest of what we tell dog owners.
Where should you stay for a Lava River Cave day?
Sunriver puts the cave, Lava Lands, and Benham Falls all within about 25 minutes, and the caldera within an hour. Our cabin is in Sunriver, 20 minutes from Bend (see our location page for the full map). After a morning at 42 degrees, the private hot tub is exactly where you’ll want to end the day, and the six SHARC passes at the cabin make the next one an easy pool-and-lazy-river rest day. Check availability and book direct: same cabin as the listings, better rate, and the volcano is right up the road.