I did 3 days (~43 miles) earlier this year starting in St. Jean Pied de Port and ending in Pamplona.
I was co-leading a travel study for college students and this was just a small portion of the overall trip, hence the short duration. I would love to do more some day.
No major advice other than do it. It was incredible.
Well, maybe a small amount of advice: stay in the hostels when you can, don't over-pack, drink plenty of water, listen to your body but know you always have a little extra in the tank, even when you feel empty.
Here's a recap (from my social media post):
Recap of walking a 43-mile portion of the Camino Frances over 3 days in May.
May 28: Stage 1 from St. Jean Pied de Port, France to Roncesvalles, Spain follows Napoleon's route for 15.5 miles up and through the Pyrenees Mountains.
Elevation gain of 4593 ft over first 13 miles (this is insane!)
Ends with a steep 2133 ft descent over last 2.5 miles
5 out of 5 difficulty level
Out of this world views!
Saw lots of sheep, cows, and horses. Took pictures of 99% of them.
Stayed in a monastery turned hostel with 200 other pilgrims (better than it sounds)
100% The most physically challenging thing I have ever done but would 100% do it again!
May 29: Stage 2 goes from Roncesvalles, Spain to Zubiri, Spain covering nearly 14 miles of mostly level/gently rolling terrain but there's steep and rocky descent just before Zubiri.
3 out of 5 difficulty level
Most of the walk was through the forest and woods
Faster pace
Felt great mentally and physically
Stayed in a smaller hostel, very nice
May 30: Stage 3 from Zubiri, Spain to Pamplona, Spain covers 14 miles from countryside into the city
Supposed to be the easiest day of the 3 with a 2 out of 5 difficulty level.
Overdid it the day before. Iliotibial band pain in right knee and severe unknown pain in left ankle and foot. Questioned if I could or should keep going.
Stubborn as a mule. Powered through the pain and made it but only by praying for the Lord's strength, having the 2 best trail buddies (Amy and Anthony) encouraging me, and at times listening to my church family singing hymns (thankful we have a YouTube channel!).
Mentally and emotionally this was the toughest day for me.
Real hotel with tub and shower for soaking achy muscles and joints!
Completed what I set out to do. Would do it again.
I have a ton of pictures but don't feel Iike going through the extra effort to post here.