Hiking assocations in Spain use a system called Método de Información De Excursiones (MIDE), or Method of Information on Excursions. Most information is in Spanish, but an English language manual is available here. Each hike receives four grades on a scale 1–5 according to four categories:

• Environment. Is there a high risk of landslides? Are there many places where falling off the trail may be lethal? Does it reach areas that are far away from rescue? MIDE lists 17 risk factors. A trek with at most one risk factor is rated 1/5, and a trek with 11 or more is rated 5/5.

• Orientation. Is the trail easy to find, large and sign-posted, or does the hiker need to be proficient with map, compass, GPS in order to find the route? A route that needs no map, such as a major trail following a lakeshore, is 1/5. Dead reckoning full of impassable obstacles is 5/5.

• Terrain. Is it a large track where one could walk with city shoes, or are there many rocks on the trail, perhaps some minor scrambling is required? City path or road would be 1/5. Seriously difficult scrambling bordering on climbing would be 5/5.

• Exertion. Basically the length of the trail. Is it steep? Is it long? Less than an hour would be 1/5. Ten hours or more would be 5/5.

The linked guide contains detailed instructions in how to specifically grade a route for each of those. I'm sure more detailed information is available in Spanish elsewhere.

Hiking assocations in Spain use a system called Método de Información De Excursiones (MIDE), or Method of Information on Excursions. Most information is in Spanish, but an English language manual is available here. Each hike receives four grades on a scale 1–5 according to four categories:

• Environment. Is there a high risk of landslides? Are there many places where falling off the trail may be lethal? Does it reach areas that are far away from rescue? MIDE lists 17 risk factors. A trek with at most one risk factor is rated 1/5, and a trek with 11 or more is rated 5/5.

• Orientation. Is the trail easy to find, large and sign-posted, or does the hiker need to be proficient with map, compass, GPS in order to find the route? A route that needs no map, such as a major trail following a lakeshore, is 1/5. Dead reckoning full of impassable obstacles is 5/5.

• Terrain. Is it a large track where one could walk with city shoes, or are there many rocks on the trail, perhaps some minor scrambling is required? City path or road would be 1/5. Seriously difficult scrambling bordering on climbing would be 5/5.

• Exertion. Basically the length of the trail. Is it steep? Is it long? Less than an hour would be 1/5. Ten hours or more would be 5/5.

The linked guide contains detailed instructions in how to specifically grade a route for each of those. There is also an online application (in Spanish) to calculate MIDE scores.

Although the system is Spanish, it would appear that, perhaps with some adaptations, it should be possible to adapt the system world-wide.

Hiking assocations in Spain use a system called Método de Información De Excursiones (MIDE), or Method of Information on Excursions. Most information is in Spanish, but an English language manual is available here. Each hike receives four grades on a scale 1–5 according to four categories:

• Environment. Is there a high risk of landslides? Are there many places where falling off the trail may be lethal? Does it reach areas that are far away from rescue? MIDE lists 17 risk factors. A trek with at most one risk factor is rated 1/5, and a trek with 11 or more is rated 5/5.

• Orientation. Is the trail easy to find, large and sign-posted, or does the hiker need to be proficiets with map, compass, GPS in order to find the route? A route that needs no map, such as a major trail following a lakeshore, is 1/5. Dead reckoning full of impassable obstacles is 5/5.

• Terrain. Is it a large track where one could walk with city shoes, or are there many rocks on the trail, perhaps some minor scrambling is required? City path or road would be 1/5. Seriously difficult scrambling bordering on climbing would be 5/5.

• Exertion. Basically the length of the trail. Is it steep? Is it long? Less than an hour would be 1/5. Ten hours or more would be 5/5.

The linked guide contains details instructions in how to specifically grade a route for each of those.

Hiking assocations in Spain use a system called Método de Información De Excursiones (MIDE), or Method of Information on Excursions. Most information is in Spanish, but an English language manual is available here. Each hike receives four grades on a scale 1–5 according to four categories:

• Environment. Is there a high risk of landslides? Are there many places where falling off the trail may be lethal? Does it reach areas that are far away from rescue? MIDE lists 17 risk factors. A trek with at most one risk factor is rated 1/5, and a trek with 11 or more is rated 5/5.

• Orientation. Is the trail easy to find, large and sign-posted, or does the hiker need to be proficient with map, compass, GPS in order to find the route? A route that needs no map, such as a major trail following a lakeshore, is 1/5. Dead reckoning full of impassable obstacles is 5/5.

• Terrain. Is it a large track where one could walk with city shoes, or are there many rocks on the trail, perhaps some minor scrambling is required? City path or road would be 1/5. Seriously difficult scrambling bordering on climbing would be 5/5.

• Exertion. Basically the length of the trail. Is it steep? Is it long? Less than an hour would be 1/5. Ten hours or more would be 5/5.

The linked guide contains detailed instructions in how to specifically grade a route for each of those. I'm sure more detailed information is available in Spanish elsewhere.