The Susitna 100 requirement for a sleeping bag is: A one piece sleeping bag (no combination of liners) rated to at least -20 degrees Fahrenheit (20 degrees below 0 degrees Fahrenheit, =28.8 degrees below 0 degrees Celsius). 

Many sleeping bags now are rated by the EN 13537 testing standard. To use this rating system to meet the Susitna 100 requirement, look at the lowest limit of comfort. Please note, this is NOT the T extreme. Information about the EN 13537 is available on the European Outdoor Group website. If you have questions about the application of this rating to the Susitna 100 sleeping bag requirement please e-mail info@susitna100.com.

There is a good selection of lightweight synthetic bags that will meet this requirement. However, your best bet is to get a down bag, preferably with a goretex shell (in case you actually do have to use the bag). Down fill is still lighter and more compressible than any synthetic fills of comparable insulation rating.

Be aware that the insulating value of sleeping bags degrades over time and is quite sensitive to the care the bag receives from its owner. Thus the label you show the Susitna 100 official at check-in may indicate that the bag meets the specification, but your personal field-test may determine a much different (and quite uncomfortable) rating.

Some racers sleep during this race. If you stop for a few winks, don't expect to find floorspace at a checkpoint. In short, think about your race plan and factor in how you plan to bivouac in the open at 20 or 30 below zero F.

Any sleeping pad is acceptable. If you are going to use an inflatable pad, you should strongly consider an insulated one with a higher R-value. Minimum size is 20" x 48".

NO space blankets. A goretex bivy sack is recommended.

If you're not into ultra-light hiking and/or climbing you probably don't own one and the $100+ cost may be prohibitive. The one-person tents marketed to bicycle tourists are fine, but will add some ounces to your gear.

Again, you're not likely to use this equipment. But if you do, it's important that your bivy sack be waterproof, especially if your sleeping bag isn't. If you do bivouac, dig or stomp out a trench in a snow bank (not too far off the trail) and use the trench for wind protection and extra insulation.

The rule says nothing more than the preceding three words and thus virtually any device you bring to the check-in will be in compliance. Before selecting your light, consider the following rather contradictory factors:

• Winter nights in Alaska do not typically have the same intense darkness you encounter in warm climates where there is rarely any snow. Snow is highly reflective and can achieve great definition with even a small amount of light. However, because some sections offer technical riding on the course, avoid the temptation to cut corners with your lighting system.

• The wilderness through which the Susitna 100 is run is criss-crossed with a number of winter trails. The race course intersects many of these trails, some of which have proven quite alluring. The course is well-marked with reflective tape posted on trees and wooden stakes, a long, wide beam of light will catch these markers day or night.  Bring extra batteries.

For traveling at night or camping, a small flashing light will alert snowmachines and other people on the trail as to your presence. If you camp for the night, hang the light from a nearby tree, a ski pole, or your bike, so roving race officials can take note of your location.

We require that you have at least a two-quart (64 ounce) capacity. If you dress properly and avoid sweating, this should be enough to get you between checkpoints. A special note to runners and snowshoers: you will be constantly cycling between hydration and dehydration and you must be disciplined about re-hydrating at checkpoints. It is advisable to carry an extra quart bottle (start with it empty) just in case you figure out that you are not keeping up.

Outdoor Research (OR) makes nice bottle jackets. If it's a cold year (or you are broke), you can make your own out of a sheet of one-inch foam rubber and some duct tape. The plastic bladder (Camelbak, Platypus, or other name brands) is overwhelmingly the weapon of choice. Most competitors are well-informed as to their virtues. Bladders, however, aren't trouble free. Racers must be alert to the tendency of hoses to freeze, especially during the longer periods between checkpoints with which runners and snowshoers must contend.

Try any or all of the following:

• Wrap the drinking tube with adhesive-backed pipe insulation, available at most plumbing and hardware stores;

• Run as much of the tube as possible under your clothes and use body heat to maintain a working temperature;

• Clear the tube after drinking by either blowing back into the tube or raising it while pinching the tip.

In 1993, a racer got second-degree burns on a good portion of his back when his bladder was filled with near-boiling water. He was a mile or two out of the checkpoint, with the bladder buried under layers of clothing, before he realized he was about to become a soft-boiled egg. Think about the outside temperature and the body heat you're generating when you fill those bladders. They can provide a welcome heating pad during a cold stretch or they can turn your clothing into a steam room and sweat you to dehydration.

Bladders can and will leak or siphon their contents everywhere but where the fluid needs to go: into your mouth. Avoid these problems by selecting a dependable valve and then gluing or taping it onto the tube. As with all of your equipment, work with your drinking system, under winter conditions if possible, before the race to find and cure its weak points.

May be consumed after the last checkpoint

You must leave the last Checkpoint with one day of food. Food and drink mix should total 3,000 calories.

You will have limited opportunities to beg, borrow, or buy food along the trail; hence plan on being completely self-sufficient for calories. All the checkpoints will have water, so bring lots of drink mix to add calories, electrolytes, caffeine, and other good stuff to your body. Unless you are willing to carry the food next to your skin, choose food that does not freeze solid at extreme temperatures. Some racers carry food to be heated up on the wood stoves at the checkpoints, such as foil wrapped pizza or sandwiches. No conventional cooking appliances are available for racer use.