Okay, so I went back to the maps on the thread
https://www.caminodesantiago.me/community/threads/guidebook-of-the-lana-advice-needed.47063/
to revive my journey last summer... Have you found the guide for the stages of the Lana there? The maps and directions are excellent, but some of the phone numbers are inaccurate and some albergues/hostels don't exist anymore. I made a choice not to take note of the changes, so unfortunately I cannot publish an update on this.
Anyway, the point where I thought I went wrong was in Mandayona where there is an alternative. The two stages are called Mandayona-Siguenza and Mandayona-Atienza and are perfectly indicated as two different stages in the maps on the thread above (in two separate maps). I thought I was lost but I was actually following one of them... Because of the lack of waymarking I got worried, backtracked and added 2 hours to that day's walk. That is where my foot problem began... Oh well. And it so happens that the stage between Mandayona and Atienza also was the one that was practically impossible to push through because of the mud: rural tracks 100 % for the first few kms. And it was the same stage where I had to climb over a fence because I couldn't figure out how to get the gate open, and then got help from the landowner herself concerning another gate. The last 7 kms into Atienza were also horrible - but beautiful of course - on a muddy path in the woods. My little foot was
finito after that... And there was at least one place in between to divide the stage in two.
That said, I think that any stage on the Lana becomes difficult in or after rain since there is a lot of rural tracks. I don't think it had to do with the Mandayona-Atienza stage in particular. And perhaps it was my fault I didn't figure out how to open those gates. I haven't heard about it being a problem for other Laners out there!
/BP