Trails I've been on

This obviously isn't a comprehensive list of all the trails I've biked, hiked, or paddled, mostly just the ones I've posted about. I've helpfully listed and linked to the relevant posts here for your benefit.

Mountain Biking

Eastern United States

Parsonsfield, Maine
Allamuchy Mountain State Park, New Jersey
Sourlands Mountain Preserve, New Jersey
Six Mile Run, New Jersey
Allaire State Park, New Jersey
Hartshorne Park, New Jersey
Chimney Rock/Washington Valley Park, New Jersey
Blue Mountain, New York
Stillwell Woods - Long Island, New York
Allegrippis Trails - Raystown Lake, Pennsylvania
Rothrock State Forest, Pennsylvania
Kingdom Trails - East Burke, Vermont
Bull Mountain - Dahlonega, Georgia
Georgia International Horse Park Mountain Bike Trail - Conyers, Georgia
White Clay Creek State Park/Middle Run Natural Area - Newark, Delaware
Pisgah State Forest, North Carolina
Bent Creek, Asheville, North Carolina
DuPont State Forest, North Carolina
Carson's Cove Trails - Roanoke, Virginia

Western United States

Hartman Rocks - Gunnison, Colorado
Horsethief Bench and "18 Road Trails" - Fruita, Colorado
Slickrock, Baby Steps, Amasa Back - Moab, Utah
Sedona, Arizona

Eastern Canada

Dundas, Ontario
Kanata Lakes - Kanata, Ontario
Hardwood Hills - Barrie, Ontario
Durham Forest - Uxbridge, Ontario
Gatineau Park - Gatineau, Quebec
Mont Tremblant, Quebec

Western Canada

Canmore Nordic Center - Canmore, Alberta
Jasper, Alberta
Sprockids Bike Park - Gibsons, British Columbia
Kicking Horse Mountain Resort, Moonraker, Mount 7 - Golden, British Columbia
Quadra Island, British Columbia
Cumberland, British Columbia
Snowden Forest - Campbell River, British Columbia
Nanaimo, British Columbia
Powell River, British Columbia
Halfmoon Bay, British Columbia
Roberts Creek, British Columbia
Squamish, British Columbia
Whistler, British Columbia
Nelson, British Columbia
Hornby Island, British Columbia
Hartland Dump - Victoria, British Columbia
Mount Tzouhalem, Cobble Hill, Maple Mountain - Duncan, British Columbia

Hiking

High Point, New Jersey
Wyanokie Circular - Norvin Green State Forest, New Jersey
Mill Brook Ridge - Catskills, New York 
Arches National Park, Utah
Conrad Kain Trail - Bugaboo Provincial Park, British Columbia
Beauty Creek - Jasper National Park, Alberta
Skoki Valley - Banff National Park, Alberta
Iceline Trail - Yoho National Park, British Columbia
Shenandoah National Park, Virginia

Paddling

Powell Forest Canoe Route - Powell River, British Columbia
Adirondacks Park, New York
La Verendrye, Quebec
Algonquin Park, Ontario
Madawaska River, Ontario