Have you ever thought about volunteering with the National Park Service? If so, check out volunteer.gov for tons of opportunities.
I just finished a week helping the Grand Canyon National Park Service Vegetation Crew removing Invasive Plants -- yup pulling weeds, putting cairns (piles of rocks) on hiking trails, cleaning up campsites, checking fences outlining the park for cuts, etc....
More
- Hiking the Grand Canyon Rim-to-Rim
- The Grand Canyon: Kaibab to Bright Angel Trail
- The Grand Canyon Rim Trail
