Bumpass Hell from Southwest Campground

This route is rated as difficult due to its length of nearly 20 km (12 miles) and significant elevation changes, with over 750 meters (2,460 feet) of ascent and descent. While the section within the Bumpass Hell basin itself is considered easier with a boardwalk, the overall journey from Southwest Campground requires good physical fitness and stamina.

The full hike from Southwest Campground to Bumpass Hell and back usually takes around 6 to 7 hours to complete, depending on your pace and how much time you spend exploring the thermal area and other points of interest.

You can typically find parking near the Southwest Campground area, which serves as the starting point for this route. It's advisable to arrive early, especially during peak season, as parking can fill up quickly in Lassen Volcanic National Park.

No, dogs are generally not permitted on trails within Lassen Volcanic National Park, including the route to Bumpass Hell. They are usually only allowed in developed areas, paved roads, and parking lots. Always check the latest park regulations before visiting.

Due to its high elevation, the trail is typically accessible from mid-July through late October, after the snow has melted. This period offers the best conditions to experience the thermal features and scenic views. Always check current trail conditions before planning your trip.

Yes, this hike is located within Lassen Volcanic National Park, so an entrance fee is required to access the park. You can find detailed information on current fees and passes on the official NPS website: nps.gov.

The terrain varies significantly. You'll encounter well-defined paths of compacted dirt, forested sections, and lush meadows. The descent into the Bumpass Hell basin involves some rocky steps and steeper sections. Once inside the basin, a boardwalk guides you safely through the thermal features. Sturdy hiking footwear is highly recommended.

Beyond the spectacular Bumpass Hell hydrothermal area, this route passes by several notable spots. You'll find the Kohm Yah-mah-nee Visitor Center near the start, and can visit Mill Creek Falls. There are also stunning viewpoints like Basin Overlook and a View of Crumbaugh Lake, as well as Cold Boiling Lake and Crumbaugh Lake.

Yes, this route utilizes sections of several official trails. You will hike along parts of the Crumbaugh Lake Trail and the Bumpass Hell Trail, as well as a portion of the Mill Creek Falls Trail.

Bumpass Hell is the largest hydrothermal area in Lassen Volcanic National Park, offering a firsthand look at active volcanism. It features giant steam vents, boiling mud pots, and colorful, mineral-rich pools. You can experience the distinctive 'rotten-egg' smell of sulfur and hear the gurgling sounds of the earth. It's home to 'Big Boiler,' one of the hottest fumaroles globally.

The Kohm Yah-mah-nee Visitor Center at the Southwest Entrance offers facilities and water. However, beyond this point, there are no dedicated water sources or facilities directly on the trail itself. It's crucial to carry sufficient water for the entire duration of this long and challenging hike.