Illegal mountain bike trails in Sehome Hill Arboretum a worry

"Someone, or some group, is illegally building mountain biking trails and jumps in the Sehome Hill Arboretum, causing erosion and hurting the native vegetation.

Now, the city of Bellingham and Western Washington University hope the public will help find those responsible and put an end to the activity. The two manage the 180-acre forested park nestled between WWU and surrounding neighborhoods."