Clothing and Gear:
Warm Weather Hiking Packing List (Day Hike)
Winter Hiking Packing List (Day Hike)
A Detailed Look at Hiking Layers
Meetup.com has numerous groups for hiking in the White Mountains. Each one is unique and you may join multiple groups to have a better chance of seeing a hike you want planned.
My hiking group: Northeast Peak Baggers
Two forums that are great places to get honest advice, become inspired, and share your hiking adventures!
There are also many groups on Facebook:
The 4,000 Footer Club-Climbing and Hiking in New Hampshire
Hike New England’s Fifty Finest
Bearfoot’s Hiking Gear Flea Market
Plus you can find Trail to Summit on Facebook!
SOLO Wilderness First Aid (plus other courses)
National Outdoor Leadership School