Consider standing up to pedal to break the monotony and exercise different muscles during longer climbs. Switch into a higher gear, and raise yourself into a standing position as you pedal. Keep your weight centered above your pedals and press down on your handlebars as you pedal standing. If you feel like quitting after 15 minutes, keep pedaling. In half an hour, you'll feel the groove.
Lighter people tend to get more out of standing.
Heavier cyclists are more efficient when they hunker down and pedal. A successful climb begins 1 to 2 hours before you hit the trail. Prepare by drinking lots of water and eating high-energy foods. For climbs that last more than an hour, bring along a sports bar or gel to keep your energy level high. Standing takes more energy, so use it with discretion.