Terwilliger (Cougar) Hot Springs
By the HotSpringsFind editorial team · How we compile records · Reviewed September 2026
Terwilliger (Cougar) Hot Springs is a developed hot spring listed near Blue River, Oregon. Reported soak temperature: 104°F. See the visit fact sheet.
Stop on Oregon Cascades Hot Springs — see all stops, ordered south to north.
Current status
Open sunrise–10pm under a managed fee program — $12 per person per 2 hours, on-site hosts and wristbands, closed Thursday 8am–noon for cleaning.
Checked July 2026 · verified against an official source · 6 sources ↓
Staying overnight?
For Belknap and the McKenzie River leg on OR-126.
McKenzie Bridge is about 8 mi from the spring (straight line).
We may earn a commission from bookings through these links, at no extra cost to you.
Before you go
- Status: Open — last verified below — confirm via USFS Willamette NF — Terwilliger (Cougar) Hot Springs.
- Cost: Reported $12/person — confirm current rates before visiting.
- Getting there: No verified hike distance on record — confirm the route and road conditions.
- Water: Reported soak temperature 104°F — always test the water before entering.
- Rules: Reported clothing required; pets reported not allowed — confirm current rules.
- Conditions: check weather, fire closures, and land-manager alerts the week you go — mountain access changes seasonally.
- Reservations/permits: none; on-site fee
- Best time to go: weekday mornings or near closing on weekdays; capacity cap means weekend waits
- Clothing reality: Official rule (Order 06-18-01-26-03, eff. Mar 15 2026–Mar 14 2028): being publicly nude where visible from FR 19 is prohibited — nudity at the pools themselves is not banned. Customary: clothing-optional at the pools. Legal: enforceable federal order at this site only.
- Kids: Allowed.
- Cell service: spotty — download maps and tell someone your plan.
- Accessibility: short ~0.25-mile gravel trail; not wheelchair accessible
- $12 per person per 2-hour limit (ages 12+); children under 12 free
- Capacity-limited entry with wristband — on-site hosts since 2026
- Closed Thursdays 8am–noon for cleaning
- Closed to all use 10pm–sunrise; no alcohol; no pets (service animals leashed OK)
- No camping at springs — use Cougar Recreation Area campgrounds
- Pay at booth; card not always reliable — bring cash
- Hazard: Post-2018 Terwilliger Fire hazards: loose rocks, flooding, debris flows, weakened trees
- Hazard: FR 19 (Aufderheide) not maintained for snow/ice in winter
- Hazard: Hot upper pools (source ~112°F)
About this spring
Oregon's most famous natural hot spring — four terraced rock pools (85-112°F) in an old-growth ravine on Rider Creek, Willamette National Forest, ~53 mi east of Eugene off the Aufderheide Scenic Byway. Reopened after the 2018 fire; bridge restoration completed with expanded parking and on-site hosts. Fee: $12/person per 2-hr session. Post-fire hazards persist — weakened trees, loose rock. Day use only; closed Thursday mornings. No alcohol.
Terwilliger Hot Springs — known locally as Cougar Hot Springs — is a cluster of geothermal pools in the Willamette National Forest, about 50 miles east of Eugene on Forest Road 19 beside Cougar Reservoir. Six stepped pools descend a forested ravine beside a small stream, fed by a spring that emerges at roughly 112°F; the top pool is hottest and the water cools as it cascades down, so visitors can pick their temperature. The pools are shallow and gravel-bottomed, ringed by rocks and bigleaf maples and Douglas firs. Volunteers maintain the site, which charges a small day-use fee ($10 per person) collected at a self-serve kiosk; the springs have a long-standing clothing-optional custom. The pools were closed for several years in the early 2010s for reconstruction after a retaining wall failed; they reopened in 2019. Best access runs April through November.
Directions & trailhead access
From Blue River, FR-19 (Aufderheide) south ~7.5 mi to the signed trailhead; 0.25-mi trail to the pools.
Oregon geothermal context
Oregon splits cleanly in two: Cascade volcanic springs like the Umpqua corridor pools west of the crest, and high-desert basin springs like the Alvord area east of it. Western sites sit in dense wet forest prone to fire closures and winter road washouts; eastern ones are remote sagebrush tubs under enormous skies. Both ends reward checking land-manager alerts before driving out.
What a developed site means here
A developed site sits between primitive and resort: improved soaking infrastructure — built tubs, decks, stairs, sometimes changing rooms or vault toilets — often run by a land trust, nonprofit, or small operator. Expect modest fees or donation requests, posted etiquette rules, and more predictable conditions than a wild pool.
Best time to visit
May – October (Spring through Fall)Pacific Northwest springs are framed by lush temperate rainforests. Summer brings dry, sunny trail conditions, while autumn provides vibrant foliage and crisp soaking weather.
Fact sheet
| Reported soak temp | 104°F |
|---|---|
| Source temp (historical) | 104°F |
| Trail access | Recorded coordinates — access unverified |
| Access fee | Reported $12/person — verify |
| Clothing policy | Reported clothing required |
| Pet policy | Reported no pets |
| Geothermal data reference | NOAA Thermal Springs List (1980 archive) |
| Check land status | USFS Willamette NF — Terwilliger (Cougar) Hot Springs |
Terwilliger (Cougar) Hot Springs FAQ
Is Terwilliger (Cougar) Hot Springs open right now?
Open sunrise–10pm under a managed fee program — $12 per person per 2 hours, on-site hosts and wristbands, closed Thursday 8am–noon for cleaning. (Status verified against an official source, last checked July 2026.)
Is Terwilliger (Cougar) Hot Springs free?
Terwilliger (Cougar) Hot Springs is listed with reported fees near Blue River. Fees are reported; confirm admission, parking and permit costs with the site manager.
What temperature is Terwilliger (Cougar) Hot Springs?
Terwilliger (Cougar) Hot Springs has a reported soak temperature of 104°F and a historical source temperature of 104°F in survey records. Historical data may not reflect current conditions — always test water before entering.
Is Terwilliger (Cougar) Hot Springs clothing optional?
Terwilliger (Cougar) Hot Springs is listed as swimsuit-required in directory records. Confirm current rules before visiting, as policies change.
How do you access Terwilliger (Cougar) Hot Springs?
Terwilliger (Cougar) Hot Springs is on public land — verify current road access, fees and rules with the land manager before visiting.
Where to stay in McKenzie Bridge
For Belknap and the McKenzie River leg on OR-126. Use the northern approach to Cougar Reservoir in winter; mountain connecting roads can close.
McKenzie Bridge is about 8 mi from the spring (straight line).
We may earn a commission from bookings through these links, at no extra cost to you.
Sources & references
- USFS Willamette NF — Terwilliger (Cougar) Hot Springs — official · 2026-07
- USFS — Terwilliger Occupancy & Use Order 06-18-01-26-03 — official · 2026-03
- Visit McKenzie River — Terwilliger — operator · 2026
- KEZI — springs reopen as new FSR 19 bridge restores access — news · 2026
- Two Wandering Soles — Terwilliger guide — community · 2026-03
Additional references for this record; a source link does not guarantee current conditions.
Details above were verified against the named sources on their listed dates — conditions change, so recheck before traveling. · How we verify our data · Report a correction
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