Save Hahamongna, a campaign of the Arroyo Seco Foundation and other organizations, is holding a "walkabout" of the site on Sat., Feb. 19.
The free escorted walking tour will give a good look at the habitat, wildlife, birds, and water resources of the area and talk about new threats the watershed (300-400 trucks a day comes to mind).
Tours will leave every half hour from 9 AM-10:30 AM, and take about two and a half hours. Make a reservation here.
The organization is also looking for volunteers at http://www.savehahamongna.org/walkaboutvol.htm