Another hearty endorsement of hiking poles. Especially if you have a bum knee and a history of ankle strains (as I do). And if you are hiking on rocky trails, crossing streams or going to be on steep descents. And as someone has already noted, very handy for clearing spider webs.

I carry one for shorter hikes (a few miles), two for longer. Highly recommend these REI super-light poles, which are half-price right now during their January sale. Far as I know, they are the lightest poles available.

The pair weigh 11.2 ounces

http://www.rei.com/product/756152


"These are the lightest, strongest trekking poles out there! Made for those up to 5'10'' who pursue minimalist backpacking and adventure racing."