The best time to visit Mineral is typically during the summer months, from late June to early September, when the weather is warm and most park facilities are fully operational.During this period, visitors can fully enjoy outdoor activities like hiking to the Bumpass Hell Trail or kayaking on Manzanita Lake. The higher elevation roads and trails, which are often closed due to snow for much of the year, are usually accessible, allowing for comprehensive exploration of Lassen Volcanic National Park. This is ideal for travellers who want to maximise their outdoor adventures and see all the park has to offer.For those who prefer fewer crowds and don't mind cooler temperatures, late spring (May to early June) or early autumn (late September to October) can also be good options. In spring, you'll see wildflowers blooming and melting snow feeding the park's streams and waterfalls, though some higher elevation areas might still be inaccessible. Autumn brings colourful foliage, particularly around Manzanita Lake, and a more peaceful experience before the winter snows arrive.