Pack a headlamp, leave the map/compass/GPS at home/car. You don't need them. Chances are you will meet up with a frequenter.
Cause you are young marathoners doesn't make you invulnerable. Granted your physical conditioning is only 1/4 of the battle. Add a pack on your back and you will know why. This isn't a 13.1 or 26.2. It's a 20 (chute factor) with 6,200+ elevation gain. AMS can kick in at the trailhead. Establish a pace you are comfortable with (2 mph...do the math...is a cakewalk), nibble, hydrate. Caveat: the 2 mph slows down to turtle mph on the chute up or down. Also, pucker factor aka wait-a-minute if not experienced with ice axe/crampons/glissading.
By the time you reach Trail Camp, civil twilight will be your lantern. If conditions warrant, alpenglow.
Friday
1 July 2011 Pacific Daylight Time
SUN
Begin civil twilight 5:07 a.m.
Sunrise 5:37 a.m.
Sun transit 12:56 p.m.
Sunset 8:15 p.m.
End civil twilight 8:45 p.m.
MOON
Moonset 7:52 p.m. on preceding day
Moonrise 5:58 a.m.
Moon transit 1:21 p.m.
Moonset 8:38 p.m.
Moonrise 7:03 a.m. on following day
Establish a cut-off time. Mission critical. When the sun sets, the chute becomes ice making glissading "danger imminent."
