Start the first full day of Winter summiting Lincoln & Lafayette. This is a 9 mile loop with 3860' of elevation gain and significant above treeline exposure. The views are spectacular. You must be experienced using snowshoes and full crampons to participate. Expect an early start and steady pace with few breaks.
I skip the 3-seasons and only hike in the most magical season of the year (winter). I have completed the NH48 in winter in 2018 and kinds of working on the seasonal grid, although every hike reminds me that winter is the best!
AMC Boston 4 Season Leader. Completed the 48 New Hampshire 4000 footers in winter. More than 400 White Mountain 4000' summits, 100+ in winter. Summited Mount Rainier (14410') 2016 and 2017, Mt. Whitney (14505') & Boundary Peak (13147') 2018, Mt Hood (11249') & Kings Peak (13527') 2019.