Morgan Hot Spring
Morgan Hot Spring erupts at an extreme 205°F in the northern Sierra Nevada, far too hot for human immersion but visually dramatic—one of California's most thermal-intense springs requiring careful safety awareness.
The spring sits at 4,982 feet in a forest transition zone where conifers begin to thin on the volcanic slopes. The 166-meter walk from the road passes through mixed pine and fir, leading to a broad clearing where the superheated water emerges violently from fractured rock. The setting is remote and geologically active—the ground itself is warm near the spring mouth, and the water creates persistent steam and distinctive sulfurous odors.
Access requires only a brief walk from the road, making it accessible to most visitors. Do not attempt to touch or immerse in the water—at 205°F, it causes severe burns instantly. Visit in the warmer months (June through September) when snow doesn't block the access road. Stay on established trails; the ground around thermal features can be unstable.
The volcanic foundation dates to the Pliocene, when lava flows blanketed this region. Geothermal activity in the northern Sierra results from proximity to the Lassen Peak volcanic field and deeper crustal heat sources. The extreme temperature makes this spring valuable primarily for geothermal research rather than recreation.
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True to its name, Hole-in-the-Ground is tucked away in a steep, tree-covered draw alongside Mill Creek. A developed campground with 13 designated sites, there is a maximum of 8 people per site at this campground. Grills and tables are provided.
Morgan Hot Spring is road-accessible, so you can bring more gear. The water is dangerously hot — bring water shoes and test pools carefully.
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