I will be traveling solo to Paris for 12 days in December. This will be my third trip to Paris, but the first time being there in winter. I plan to see the indoor sights that I still have not visited, as well as hang out at many cafes throughout the day to warm up and get refreshed. But I also enjoy activity, notably biking (moderate level--I'm strong but by no means a seasoned biker), and hiking.
Are there opportunities for such activity within Paris itself? I know there are canals, so perhaps there are good bike/hiking trails along these? Ideally, I'd love to find some towns outside of Paris that are particularly charming, scenic, with places to stop for a glass of wine or a coffee, possibly with a nice view. I'd be willing to ride the train for 1-2 hours each direction to reach such a place.
And what tips, besides getting off to an earlier start to maximize daylight and warmth, do you have for sightseeing in Paris in December? I am sure Christmas Markets will be in existence, along with department store displays and holiday lights along the major streets, but what else will be good to do/see/experience this time of the year?
Thanks in advance.