Armoring

armor4.jpg

Armoring is a method of using large rocks to harden or pave a section of trail to help prevent erosion. Armoring is frequently used on sections of trail that cross areas that are frequently soft and/or wet.

While routing the trail around these areas is always the best solution, sometimes it is just not possible. A properly built contour trail will follow along hillsides and their natural drainage points. It is nearly inevitable that you will encounter water when routing your trail.

Care must be taken to prevent erosion, or even damage to the surrounding environment.

IMBA's Trail Solutions guide to building singletrack describes 6 ways that armoring can benefit a trail:

  • Hardening a contour trail in extremely rainy climates
  • Stabilizing steep sections of contour trail with grades from 20 to 45 percent
  • Reinforcing stream crossings
  • Crossing low-lying or muddy or sandy area where reroute isn't possible
  • Hardening landing areas following jumps or drop-offs.
  • Toughening the trail surface on high-traffic routes to withstand user-caused erosion.

armor1.jpg

 

The first step in the armoring process is to select an area that is often wet, or is suffering from user-caused erosion. In our example, we have selected a low-lying area and marked it in advance with pink pin-flags.

armor2.jpg

 

The next step is to locate and collect some very large rocks. Large, flat-faced stones are widely available in our area, so the "flagstone paving" technique of armoring is very popular. Each stone is laid with it's flattest surface facing up, at the same grade as the tread surface.
armor3.jpg

The final step is to fill in the gaps with good mineral soil or gravel. This will help reduce the amount of settling that occurs

Posted by Sean Cairns

IMBA Rules of the Trail


The way we ride today shapes

imbasmwh

trail access tomorrow.

Do your part to preserve and enhance our sport's access and image by observing the following rules of the trail, formulated by IMBA, the International Mountain Bicycling Association. These rules are recognized around the world as the standard code of conduct for mountain bikers. IMBA's mission is to promote mountain bicycling that is environmentally sound and socially responsible.

1. Ride On Open Trails Only.

Respect trail and road closures (ask if uncertain); avoid trespassing on private land; obtain permits or other authorization as may be required. Federal and state Wilderness areas are closed to cycling. The way you ride will influence trail management decisions and policies.

2. Leave No Trace.

Be sensitive to the dirt beneath you. Recognize different types of soils and trail construction; practice low-impact cycling. Wet and muddy trails are more vulnerable to damage. When the trailbed is soft, consider other riding options. This also means staying on existing trails and not creating new ones. Don't cut switchbacks. Be sure to pack out at least as much as you pack in.

3. Control Your Bicycle!

Inattention for even a second can cause problems. Obey all bicycle speed regulations and recommendations.

4. Always Yield Trail.

Let your fellow trail users know you're coming. A friendly greeting or bell is considerate and works well; don't startle others. Show your respect when passing by slowing to a walking pace or even stopping. Anticipate other trail users around corners or in blind spots. Yielding means slow down, establish communication, be prepared to stop if necessary and pass safely.

5. Never Scare Animals.

All animals are startled by an unannounced approach, a sudden movement, or a loud noise. This can be dangerous for you, others, and the animals. Give animals extra room and time to adjust to you. When passing horses use special care and follow directions from the horseback riders (ask if uncertain). Running cattle and disturbing wildlife is a serious offense. Leave gates as you found them, or as marked.

6. Plan Ahead.

Know your equipment, your ability, and the area in which you are riding -- and prepare accordingly. Be self-sufficient at all times, keep your equipment in good repair, and carry necessary supplies for changes in weather or other conditions. A well-executed trip is a satisfaction to you and not a burden to others. Always wear a helmet and appropriate safety gear.