Here is a list of course difficulties for those interested.  The "Gnarliness Value (GV)" is a measure of the relative difficulty of each course.  See the iteration rules for an in-depth discussion of the matter, but the basic idea is that you divide your GV by your time in minutes to get your score on that course.  Bigger GV / shorter time = higher score.  Pretty simple, huh?
 

BLUE COURSES

GV    Event Description

7375 Mt. Pinos, 6-9-01, blue, 8.0k 390m 14
7896 Mt. Pinos, 6-10-01, blue, 7.8k 305m 15
8184 Burton Creek, 6-16-01,Blue 9.175 km, 205 m climb, 17 controls
7852 Burton Creek, 6-17-01,Blue 10.275 km, 190 m climb, 17 controls
5460 Morgan Territory 10-27-01 blue
8783 Morgan Territory 10-28-01 blue
6922 Palm Desert NIGHT O 12-2-01 blue
9426 Palm Desert 12-1-01 blue
3671 Palm Desert 12-2-01 blue
8656 Tuscon 12-15-01 RED blue
8305 Tuscon 12-16-01 RED blue
7423 Vasquez 12-8-01 blue

RED COURSES

GV    Event Description

6403 Mt. Pinos, 6-9-01, red, 6.3k 250m 11
7656 Mt. Pinos, 6-10-01, red, 5.9k 280m 14
7745 Burton Creek, 6-16-01,Red 7.000 km, 170 m climb, 13 controls
7992 Burton Creek, 6-17-01,Red 8.075 km, 110 m climb, 13 controls
6245 Morgan Territory 10-27-01 red
6661 Morgan Territory 10-28-01 red
6632 Palm Desert NIGHT O 12-2-01 red
8532 Palm Desert 12-1-01 red
3107 Palm Desert 12-2-01 red
7540 Tuscon 12-15-01 RED blue
7234 Tuscon 12-16-01 RED blue
5494 Vasquez 12-8-01 red

GREEN COURSES

GV    Event Description

5441 Mt. Pinos, 6-9-01, green, 5.2k 230m 10
6192 Mt. Pinos, 6-10-01, green, 5.0k 195m 9
6558 Burton Creek, 6-16-01,Green 5.450 km, 115 m climb, 11 controls
5176 Burton Creek, 6-17-01,Green 5.375 km, 85 m climb, 9 controls
6006 Morgan Territory 10-27-01 green
5583 Morgan Territory 10-28-01 green
6015 Palm Desert NIGHT O 12-2-01 green
2520 Palm Desert 12-1-01 green
4078 Palm Desert 12-2-01 green
8277 Tuscon 12-15-01 green brown
7445 Tuscon 12-16-01 green brown
5959 Vasquez 12-8-01 green

BROWN COURSES

GV    Event Description

5683 Mt. Pinos, 6-9-01, brown, 4.5k 155m 10
6078 Mt. Pinos, 6-10-01, brown, 4.0k 140m 8
5619 Burton Creek, 6-16-01,Brown 3.650 km, 75 m climb, 9 controls
4195 Burton Creek, 6-17-01,Brown 3.450 km, 55 m climb, 8 controls
6080 Morgan Territory 10-27-01 brown
5417 Morgan Territory 10-28-01 brown
5664 Palm Desert NIGHT O 12-2-01 brown
2744 Palm Desert 12-1-01 brown
4746 Palm Desert 12-2-01 brown
8420 Tuscon 12-15-01 green brown
7597 Tuscon 12-16-01 green brown
5109 Vasquez 12-8-01 brown

ORANGE COURSES

GV    Event Description

7837 Mt. Pinos, 6-9-01, orange, 4.5k 155m 8
8263 Mt. Pinos, 6-10-01, orange, 4.2k 160m 11
9670 Burton Creek, 6-16-01,Orange 4.550 km, 100 m climb, 10 controls
9037 Burton Creek, 6-17-01,orange 4.325 km, 85 m climb, 10 controls
6907 Morgan Territory 10-27-01 orange
4113 Morgan Territory 10-28-01 orange
13339 Palm Desert NIGHT O 12-2-01 orange
4865 Palm Desert 12-1-01 orange
3172 Palm Desert 12-2-01 orange
14410 Tuscon 12-15-01 orange
9935 Tuscon 12-16-01 orange
7358 Vasquez 12-8-01 orange

YELLOW COURSES

GV    Event Description

5064 Mt. Pinos, 6-9-01, YELLOW,3.1k 105m 9
2320 Mt. Pinos, 6-10-01, YELLOW,3.0k 70m 9
4748 Burton Creek, 6-16-01,YELLOW 2.45 k, 60 m, 9 controls
3343 Burton Creek, 6-17-01,YELLOW 3.0 k, 60 m, 11 controls
1827 Morgan Territory 10-27-01 YELLOW
2877 Morgan Territory 10-28-01 YELLOW
4148 Palm Desert NIGHT O 12-2-01 YELLOW
3573 Palm Desert 12-1-01 YELLOW
3453 Palm Desert 12-2-01 YELLOW
8093 Tuscon 12-15-01 YELLOW
10478 Tuscon 12-16-01 YELLOW
6574 Vasquez 12-8-01 YELLOW

WHITE COURSES

GV    Event Description

3971 Mt. Pinos, 6-9-01, WHITE, 1.9k 70m 8
3970 Mt. Pinos, 6-10-01, WHITE, 1.9k 50m 8
2155 Burton Creek, 6-16-01,WHITE 1.7 k 35 m 11 controls
2484 Burton Creek, 6-17-01,WHITE 1.975 k, 40 m, 11 controls
4067 Morgan Territory 10-27-01 WHITE
2662 Morgan Territory 10-28-01 WHITE
2490 Palm Desert NIGHT O 12-2-01 WHITE
2357 Palm Desert 12-1-01 WHITE
4980 Palm Desert 12-2-01 WHITE
1904 Vasquez 12-8-01 WHITE 1