If the summer finds you near Yellowstone, consider some of the activities of this group:
About the Greater Yellowstone Coalition
Our mission: People protecting the lands, waters, and wildlife of the Greater Yellowstone Ecosystem, now and for future generations.
GYC was founded in 1983 on a simple premise: An ecosystem will remain ahealthy and wild ecosystem only if it is kept whole.
history = http://greateryellowstone.org/media/pdf/founding-GYC-revised.pdf
Since that time GYC has emerged as a nationally known advocate for the idea that ecosystem level sustainability should guide the management of the region’s public and private lands.
Perhaps the best measure of GYC's leadership and influence is its base of more than 8,500 members, 80 conservation and outdoor organizations, and 230 businesses. These constituents have come together to fulfill GYC's goal of preserving and protecting the Greater Yellowstone Ecosystem and the unique quality of life it sustains.
http://greateryellowstone.org/issues/index.php
Events= hikes, trail projects, etc. (free, although they will probably offer to sell you membership in the non-profit organization)
http://news.greateryellowstone.org/event/
The cure for a fallacious argument is a better argument, not the suppression of ideas.
-- Carl Sagan