2.7
(28)
42
hikers
01:12
4.38km
70m
Hiking
The Cold Boiling Lake Trail offers a truly unique experience in Lassen Volcanic National Park, leading you through pleasant fir forests and expansive marshy meadows that burst with wildflowers in the summer. The highlight is undoubtedly Cold Boiling Lake, where cold carbon dioxide gases gently percolate to the surface, creating…
Last updated: June 9, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Lassen Volcanic Wilderness
Waypoints
Start point
Parking
Get Directions
56 m
Highlight • Rest Area
Tip by
1.25 km
Highlight • Lake
Tip by
2.31 km
Highlight • Lake
Tip by
4.38 km
End point
Parking
Way Types & Surfaces
Way Types
4.29 km
< 100 m
Surfaces
4.29 km
< 100 m
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Elevation
Highest point (2,270 m)
Lowest point (2,210 m)
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Weather
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Tuesday 7 July
21°C
9°C
0 %
Additional weather tips
Max wind speed: 15.0 km/h
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This route was planned by komoot.
The main trail to Cold Boiling Lake is relatively short and easy. It's about 4.4 km (2.7 miles) round trip and generally takes around 1 hour and 10 minutes to complete. If you extend your hike to other destinations like Bumpass Hell, the duration will significantly increase.
The trail officially starts at the Kings Creek Picnic Area within Lassen Volcanic National Park. This area offers a peaceful setting and serves as the primary trailhead. Parking is available at the picnic area.
Yes, the initial section of the trail to Cold Boiling Lake is considered easy and is very suitable for beginners and families. It features a wide, flat path through thinly forested areas with minimal elevation gain. However, extending the hike to Bumpass Hell involves a moderate, steady climb.
The most distinctive feature is Cold Boiling Lake itself, where cold carbon dioxide gas bubbles to the surface, creating the illusion of boiling water. You'll also pass through serene pine forests, expansive grassy meadows, and may spot wildflowers, birds, and deer. Crumbaugh Lake, often visited in conjunction, offers clear water and views of distant peaks.
The trail is best enjoyed during the summer months, particularly in early July, when a constantly changing variety of wildflowers can be seen. The weather is generally pleasant, making for ideal hiking conditions. Access might be limited in winter due to snow.
No, dogs are generally not permitted on trails within Lassen Volcanic National Park, including the Cold Boiling Lake Trail. This is to protect wildlife and natural resources. Always check the latest park regulations before bringing pets.
Yes, Lassen Volcanic National Park charges an entrance fee. This fee provides access to the park for a certain period. While specific hiking permits are not typically required for day hikes like this one, it's always a good idea to check the official nps.gov website for the most current information on fees and any potential permit requirements.
Yes, the Cold Boiling Lake Trail serves as a gateway to several other significant park destinations. You can extend your hike to Crumbaugh Lake, or embark on a more challenging 1.9-mile climb to the renowned Bumpass Hell hydrothermal area. The route also passes through sections of the Crumbaugh Lake Trail and the Bumpass Hell Trail.
The initial section from the Kings Creek picnic area is a wide, flat path through thinly forested areas. As you approach Cold Boiling Lake, the trail descends slightly into thicker fir and pine trees. If you continue towards Bumpass Hell, expect a steady climb of approximately 750 feet over 1.9 miles, with narrow sections along a steep hillside. The landscape includes dusty ground, lush meadows, and some areas with charcoal-colored trunks from the Dixie Fire.
The Dixie Fire in 2021 did affect parts of the park. Along the trail, you might notice some areas with darker, eerie-looking charcoal-colored tree trunks, particularly contrasting with the vibrant green grasses and reeds bordering the lake. This offers a poignant reminder of the fire's impact and the park's ongoing recovery.
Even for this relatively easy hike, it's wise to bring essentials. Pack plenty of water, snacks, sun protection (hat, sunscreen), and wear comfortable hiking shoes. Layers of clothing are recommended as mountain weather can change quickly. If extending to Bumpass Hell, consider trekking poles for the steeper sections.
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