I just walked this Dos Puentes del Malpaso route from Riego to Molinaseca in late March 2024. We are in our 60s. I have walked many different Caminos. My partner was only on her second. We have some arthritis in the legs. My partner is moderately limited in her walking capacity by the arthritis. It did start to rain about 45 minutes into our walk on this section. The rain definitely made it harder for fear of slipping and falling although we managed to stay upright.
The walk is entirely in the woods. There are no roads to bail out on. For long periods we had no cell signal (Vodafone). You won’t be able to call a taxi.
Somewhere the walk was described as moderate in difficulty. We found it very hard. There are sections where one false step to the right will send you falling down the mountainside. We were scrambling on our hands a fair amount. There is one section where you have to traverse a sheer rock face. This was difficult and dangerous for us. Possibly this section would be easier coming from Molinaseca.
Admittedly, we took a relaxed walk from El Acebo to Riego, and then a long bar stop, then we stopped to look at a lot of things on the Malpass trail before we realized we were in it up to our necks!!
. We made it into Molinaseca at sunset!
The hike is indeed beautiful. The puentes were magnificent. But, in my opinion, this is a real hikers trail not really a Camino trail. Other peoples opinions might differ but I base this on having walked the following Caminos, some several times; Frances, Norte, Primitivo, Aragonés, Catalan, and Finisterre/Muxia.
So if you are reasonably fit and experienced this is a great trail. But I think it’s not really a substitute for the normal Camino path.
However to your question, in the first 30 minutes, the initial path in the rain will be very muddy and wet with standing/running water but if we made you can too. There is a small arroyo to ford early on. The difficulty will depend on how much rain has been falling. It was about 6 feet wide for us and we crossed in sandals and put on socks and shoes again on the other side. The path is almost entirely strewn with loose rock so rain will make it more tricky.
I would love to hear what others thought of this alternative.