Mount Rainier National Park

Green Lake Trail

Green Lake Trail is a long forest route along the former road and up to a quiet lake beneath forested ridges. The mileage matters, but the real character of the route comes from road walking, rainforest, creek crossings, steady climbing, and mud. Plan the entire outing—parking, trailhead preparation, movement time, breaks, changing conditions, and the return—rather than treating the destination as the only part of the hike.

The details below turn the route into a usable day plan. They explain the trailhead, major landmarks, permits, likely trouble points, pace, gear, and a shorter objective. Operating rules and conditions can change, so compare the plan with the managing agency's current alert before leaving for Carbon River entrance.

Green Lake Trail hiking trail image

The above image of Green Lake Trail was generated and may not accurately represent what it currently looks like.

DistanceAbout 9.6 miles round trip
ElevationAbout 1,300 feet
Time5 to 7 hours
DifficultyStrenuous

Trail Conditions and Effort

The route is best understood as out and back, with road walking, rainforest, creek crossings, steady climbing, and mud. Those details affect speed, footwear, balance, water use, and whether every member of the group can complete the same movement on the return. A short trail with chains, deep sand, submerged rocks, ice, or steep stone steps can require more judgment than a longer smooth path.

Route walkthrough

1

Trailhead and First Section

Begin at Carbon River entrance after confirming current access, weather, route conditions, water needs, and a firm turnaround time. Pause at the end of this stage to compare actual time, water use, weather, and group condition with the plan. Confirm the next junction before moving, because a familiar-looking trail or a line of footprints can lead away from the intended route.

2

Main Route

Continue through road walking, rainforest, creek crossings, steady climbing, and mud, checking each junction and landmark against the current official map while reassessing weather and group condition. Pause at the end of this stage to compare actual time, water use, weather, and group condition with the plan. Confirm the next junction before moving, because a familiar-looking trail or a line of footprints can lead away from the intended route.

3

Turnaround and Return

Trailhead access and arrival

The starting point is Carbon River entrance. Save the trailhead, route map, and permit proof offline. Arrive with enough time to solve a full lot or shuttle wait without rushing. Never invent roadside parking, cross a closed gate, or start late because the drive was longer than expected. A full access point is a reason to use the backup route selected at home.

Permit, services, and current rules

Plan for the Return Trip

Outward leg

Return leg

Ranger Falls is the best shorter objective. The return can be uphill, hotter, darker, more crowded, harder on tired knees, or slower through water and loose ground. Keep food, water, attention, and daylight in reserve. Make the turnaround decision before anyone is depleted enough to argue for continuing.

Season, weather, and daily timing

Hazards to manage deliberately

  • Footing: Slow down on wet rock, loose stone, roots, sand, snow, ice, or submerged surfaces. Use poles or traction only when practiced and appropriate.
  • Weather: Leave ridges, open summits, river corridors, and slot canyons before storms arrive. Thunder, rapidly rising water, or sudden wind is an action signal.
  • Heat and cold: Protect skin, carry layers, and watch for headache, nausea, confusion, shivering, or declining coordination. Do not wait for collapse.
  • Navigation: Confirm every important junction on the return. Crowds, footprints, and a phone dot are not substitutes for an offline map.
  • Wildlife: Give animals space, secure food, control pets where allowed, and follow local bear, bison, goat, snake, or nesting-season guidance.
  • Group management: Stay together, place a capable adult at the rear, and never leave a struggling person alone so others can reach the destination.

What to carry

  • Official route map, offline navigation, charged phone, cable, and backup battery.
  • Enough water for the full route, current conditions, and an unexpected delay.
  • Food for the planned time plus a reserve portion kept for the return.
  • Weather layers, rain or wind shell, hat, sunglasses, sunscreen, and dry insulation where needed.
  • Headlamp, first aid, blister care, personal medication, whistle, and emergency shelter.
  • Footwear and route-specific equipment for road walking, rainforest, creek crossings, steady climbing, and mud.

Who should choose another hike

Leave enough margin to handle the part of the day that was not in the itinerary.

Frequently asked planning questions

How hard is Green Lake Trail?

The common rating is Strenuous, but practical difficulty depends on road walking, rainforest, creek crossings, steady climbing, and mud, weather, altitude, water, crowding, and the group's pace. Use the numbers and terrain together.

How early should I start?
Is there a shorter version?

Ranger Falls is the best shorter objective.

Can I rely on water or trailhead services?
What should I verify that morning?