The hike up to the top of Marum volcano was a whole different experience to the short walk to Yasur. It involved 1000m of climbing through thick forest, and it took us about three hours to get to the edge of the ash plains. My guide, Solomon, told me about the fastest people he'd ever gone up with, and told me that a German woman was the record holder. He wouldn't tell me exactly how fast she'd gone, so I guess I didn't match her time, but three hours was pretty good going anyway. Another hour or so took us to the East Camp, and it was another 45 minutes to the crater's edge.
It was cold and forbidding up there, and the summit was in thick cloud when we got there. Visibility was just a few metres. Somewhere unseen far below was a lava lake but it was looking like I might not see it. Solomon was pessimistic. In the murk I could see a large collection of tents close to the crater's edge. They turned out to be a New Zealand documentary crew who had camped there for a couple of weeks to be sure of seeing the lava lake.
We waited in the cold and the rain, and we got lucky. The clouds began to thin out, and I caught a glimpse of deep red down in the crater. Then suddenly, just for a few minutes, the weather cleared completely and I got to see one of the most extraordinary things I've ever seen. To see molten rock frothing and boiling like tomato soup was something unbelievable.