The Gaden Monks will be in Grass Valley from Jan 15th - Jan 29th. This is sponsored by the Sierra Friends of Tibet.
The complete schedule is online. Most of the events take place at St. Josephs Cultural Center (where my Taiko group: Grass Valley Taiko just happens to have our dojo). This is a rare opportunity, it's not clear when/if the monks will be in our area again.
I am looking forward to viewing the Sand Mandala which will be open for viewing daily 10 AM - 4 PM starting on Sunday 1/15. On Friday 1/27, 7 PM there will be an explaination of the Sand Mandala.