Below you will find a quick reference describing how the expeditions are rated in difficulty per WI standards. 
If you have any further questions, don't hesitate to contact us at anne@wildernessinitiative.com

Level	Hiking/Backpacking
1	If you want to move away from your slothful ways and are looking for, shall we say, "entry level"​
2	If you have been getting more active and accustomed to some sweat every now and then
3	If you could walk a mile or two with a light load without needing crutches the next day
4	If you actually enjoy a day hike with some elevation gain and have no trouble with a fully loaded pack
5	This is top level strenuous hiking; steep and often exposed terrain to be expected. Miles per day will vary, but expect to be hiking for 10+ hours a day carrying a heavy pack with specialized gear. Fording rivers, post holing in snow, and scrambling up/down mountains may be expected. ​Elevation gain/loss may be greater than 4,000' per day.  Previous outdoor experience is required. Physical activity preceding any WI trips at this level need to be both strength and cardio focused.

Level	Mountain Biking
1	If you are just not sure mountain biking is for you and you want to get a feel for bikes and dirt
2	If you ride some but ready to venture off the pavement
3	If you know the joy of mud on your tires and tree branches in your face but not ready for 6 hours of it
4	If you are ready for 6 hours of it
5	If you are a serious mountain biker and ready for the challenges of  monster climbs and sick descents

Level	Water Sports: Whitewater Rafting, Canoeing, Kayaking, Tubing
1	If you are looking for a slow float on flat water with land in sight
2	If you are ready for a little rolling water and a few miles of paddling
3	If you are ready to test your skills on white water with possibility of swimming out of a gnarly situation
4	If it's not your first rodeo, live to boof and can consistently roll without the hand of God delivering you