Trail

Haʻakulamanu via Sulphur Banks Trail

Trail
Steam rising from a colorful geothermal area

This 1.2-mile thermal walkthrough sits at the intersection of easy and intense. You'll witness colorful sulfur deposits, steam vents, and raw volcanic phenomena in real time—if your lungs can handle hydrogen sulfide and carbon dioxide seeping from the ground. The NPS explicitly warns visitors with respiratory issues to skip it. For everyone else: minimal elevation, 30-45 minutes, pure geothermal spectacle.

Quick facts

Distance Miles
1.2
Route Type
Out-and-back from Kīlauea Visitor Center; wheelchair-accessible alternative access at Steam Vents Parking Lot
Difficulty Level
Easy
Elevation Gain Feet
0

Trail profile

Distance Miles
1.2
Route Type
Out-and-back from Kīlauea Visitor Center; wheelchair-accessible alternative access at Steam Vents Parking Lot
Difficulty Level
Easy
Elevation Gain Feet
0
Estimated Time
30-45 minutes at a leisurely pace for the main trail. Add 15 minutes if transitioning between both access points.
Trail Surface
Compacted volcanic rock, hardened lava, some paved sections near visitor center
Trail Features
  • Colorful sulfur deposits
  • Steam vents and thermal emissions
  • Active geothermal zone
  • Volcanic gas phenomena
  • Mineral formations
Trail Highlights
Active geothermal landscape with visible volcanic gases, colorful sulfur and mineral deposits, steam vents, and raw volcanic thermal phenomena shaped by active underground heat

Trailhead & access

Trailhead Location
Kīlauea Visitor Center (primary trailhead toward Volcano Art Center Gallery) or Steam Vents Parking Lot (wheelchair-accessible access across the street from Steam Vents)
Shuttle Required
0
Shuttle Details
Not required. Free parking at Kīlauea Visitor Center and Steam Vents Parking Lot.

Permits & conditions

Permit Details
No permits required for day hiking.
Fees
$30 per private vehicle (park entrance fee). No additional trail fees. Pedestrians/cyclists: $15. Motorcycle: $25. America the Beautiful annual pass: $80.
Trail Status
Open
Seasonal Closures
No seasonal closures

Facilities & rules

Restrooms At Trailhead
0
Water Sources
Dry trail—bring your own water. Refill and rest at Kīlauea Visitor Center before starting.
Accessibility
Main trail from Kīlauea Visitor Center: flat to gently rolling, compacted volcanic rock, well-defined path. Wheelchair-accessible alternative trail available at Steam Vents Parking Lot (across the street from Steam Vents area).

Safety & strategy

Hazards
  • Volcanic gases (sulfur dioxide, hydrogen sulfide, carbon dioxide)
  • Respiratory and cardiovascular hazard
  • Sharp volcanic rock
  • Heat and sun exposure
  • Elevated ground temperature in some areas
Hazard Details
Volcanic gases including sulfur dioxide and hydrogen sulfide seep from the ground. The NPS explicitly warns visitors with respiratory issues (asthma, heart conditions), pregnant women, infants, and young children to avoid this trail. Ground temperature may be elevated in thermal zones. Volcanic rock is sharp and jagged.
Best Season
Year-round. Park open 24 hours daily, 7 days a week. Thermal phenomena most visible in cooler months when steam contrasts sharply with air temperature.
Best Time To Visit
Start by 9 AM to beat crowds and afternoon heat. The park is open 24/7, but thermal phenomena are most visible in early morning when steam contrasts sharply with cooler air. Avoid midday—zero shade, full sun.
Tips Advice
  • Bring 2L water minimum—zero shade in thermal zone, full sun exposure
  • Wear sunscreen, hat, and UV protection
  • Avoid this hike if you have asthma or respiratory issues—NPS warning is real
  • Do not touch colorful sulfur deposits or mineral formations
  • The rotten-egg smell is hydrogen sulfide—it's real, not imagination
  • Tighten your boots—volcanic rock is sharp and jagged
  • If gas smell gets intense, turn back—your lungs are signaling distress

More details

Park Area
Kīlauea Crater Area
Trail Markers
Well-marked from Kīlauea Visitor Center toward Volcano Art Center Gallery. Directions provided at trailhead.
Dogs Allowed
No
Shade Level
Full sun with minimal shade. The thermal area has very few trees due to underground heat. Wear sun protection.
Emergency Contacts
Contact park rangers at Kīlauea Visitor Center (at trailhead). Park is managed by Hawaiʻi Volcanoes National Park.
Map Recommended
0
Snow Dates
No snow (Hawaiʻi Volcanoes does not experience snow at this elevation)
Mud Season
No mud season (volcanic terrain)
Fall Colors Peak
No fall colors (tropical volcanic environment)
Insider Tips
  • Start by 9 AM to avoid crowds and afternoon heat
  • Thermal phenomena are most dramatic in early morning when steam contrasts with cool air
  • Bring a light layer—steam can be cool if you stand in it
  • The colorful deposits are pure sulfur and minerals—do not touch or disturb
  • If the rotten-egg smell gets intense, turn back—your lungs are telling you something real
  • Check in with rangers at visitor center first, grab water, and ask about current conditions
Family Friendly Notes
Not recommended for young children, infants, or pregnant women due to volcanic gases. NPS explicitly advises against this hike for these groups. Supervision required for older children due to sharp volcanic rock and thermal features. Hand-holding recommended near steam vents and thermal areas.
Nearby Facilities
Kīlauea Visitor Center (at trailhead), Volcano Art Center Gallery, Steam Vents Parking Area, park headquarters
Review Summary
Hikers praise the unique geothermal spectacle and easy accessibility, but heed the respiratory warnings—volcanic gases are potent and real. Most who visit say the 1.2-mile walk is brief but unforgettable, though some find the hazard warnings off-putting enough to skip it entirely.

Location

Frequently asked questions

Is this safe if I have asthma?

No. The NPS explicitly warns that visitors with asthma or other respiratory conditions should avoid this trail due to volcanic gases (hydrogen sulfide, sulfur dioxide, carbon dioxide).

How long does it really take?

30-45 minutes for the main trail. It's quick and not strenuous, but every step showcases geothermal spectacle.

What gear do I absolutely need to bring?

2L water minimum, sunscreen, hat, closed-toe hiking boots (volcanic rock is sharp). If you have any respiratory or cardiac issues, bring the wisdom to skip this one—NPS warnings exist for a reason.

Are there alternatives if the main lot is full?

Yes. The wheelchair-accessible trail at Steam Vents Parking Lot accesses the same geothermal zone from a different angle. Check in with rangers for directions.

Will I actually see volcanic gases and geothermal activity?

Yes. Steam vents, colorful sulfur deposits, and visible gas emissions are the entire point. The rotten-egg smell (hydrogen sulfide) confirms it's real and intense.

Is 1.2 miles too short to bother with?

No. The distance is deceptive—1.2 miles doesn't capture the intensity of active geothermal phenomena. If you want to see raw volcanic activity without major elevation gain or time commitment, this is the tactical choice.

Footprints Area

Ancient footprints frozen in volcanic ash. Short but serious: steep, exposed, and unforgiving.

Devastation Trail

1-mile paved cinder views with zero elevation. Easy for all ages, brutal sun exposure. Nēnē geese—respect distance.

Halemaʻumaʻu Trail

Drop 425ft into the crater. Uneven lava, full sun, panoramic payoff. Poles and water mandatory.

Keanakākoʻi

Crater views and volcanic history without the technical climb. Bring water and sun armor—exposure is real.

Kīlauea Iki Trail

Drop 400 feet into a live volcanic crater and cross its hardened lava lake. The ascent punishes quads. Come early.

Some booking links below are affiliate links, which may support YourNPGuide at no extra cost to you. Affiliate disclosure.

Sources

Editorial review: YourNPGuide Editorial Team. Information is compiled from official sources, verified traveler reviews, and editorial research; no firsthand visit is implied unless explicitly documented. Learn how YourNPGuide works.

Last updated July 2026. Report an issue.