“A very convenient, in town, after work ride with not much technicality.”
— Paul Rogers
There are several areas and spur trails in this park that are CLOSED due to arsenic found at the mine sites. They are clearly marked and/or barricaded, PLEASE steer clear of these areas to keep the park, and yourself, SAFE....The parks website makes note of these closures, but it is vague and out of date. You can call the Park's visitor center for more info. Due to the serious health risks of ARSENIC, the park keeps those closures well marked and fenced off (6 ft. chain link).
This is the main trail/dirt path through the center of the park. There are several route choices with a combination of hardpack trail or dirt road. All the trails are short, have mellow climbs, and there is no way to really get lost. You're pretty much in Grass Valley proper so if you get off track you'll dump out on a surrounding street somewhere.
The park itself is worth a visit, make sure to do the tour! There are several mines, lots of industrial mining hardware laying about, and the visitor center and Empire cottage/house are spectacular!