The following groups and individuals run tree-climbing classes, courses , or adventures :
New York Botanical Garden Bronx River Parkway
One-day class in spring and fall, three-day class in early summer.
Dancing With Trees Alto, Ga.
Classes year-round by appointment, including private guided climbs ($125 per person, maximum two people); Intro to Tree Climbing ($250 minimum for groups of up to 10); B&B in the Treetops ($235 per person); basic course ($450 ), facilitator's course ($850 ), and single- rope technique course ($400 ).
Tree Climbers International Atlanta
Introductory climbs twice a month ($15 per person); basic course ($450 ); rigging course ($225 ); facilitator's course ($750).
Tree Climbing USA Fayetteville, Ga.
Basic course ($400) once a month ; beyond the basics ($300); facilitator's course ($375) .
Tree Climbing Colorado 303-526-2904
Introductory climbs ($25) and a basic course ($450).
Arbor Quest Unlimited www.arborquest.org
Based in Bloomfield, Mich. , this non profit organization runs guided tree-climbing trips for people of all ability levels, but specializes in working with those who have disabilities.
Tree Climbing Northwest Grants Pass, Ore.
Half-day guided climbs ($125; $225 for two; four hours); basic course ($450), rigging course ($200), single-rope course ($250), facilitator's course ($750); public and private tree-climbing adventures ($12-$20 per person); ZZZs in the TreeZ overnight ($200 for one; $300 for two); candlelight dinner in the trees ($350 for two); and Tree Week, a weeklong camp ($900 ).
Pacific Tree Climbing Institute
Eugene, Ore. 866-653-8733
Guided climbs using single-rope technique ($200-$250); private instruction ($65 per hour); treetop camping ($500-$550) .
Kansas City Tree Climbers Club Kansas City, Kan.