How to Reserve

1. Reserve the Group Campsite
Because it is directly adjacent
to the Observatory, the Group Campsite must be reserved and the Park Campground Fee paid whether or not the group
plans to camp.

a) Go to Reserve California.com. Be sure to reserve the Group Camp, not the family camp.
At Reserve California, the Group Campsite can be reserved up to seven months in advance. The Group Campsite is very popular on weekends, so make your reservation for a Friday or Saturday night as far in advance as you are able.

b) If you need to make a reservation more than 7 months in advance, please contact
the Campground Staff:
[email protected]
to make arrangements. Any reservation made through the Campground Staff will require payment in full at the time the arrangement is set up.

c) For Sunday through Thursday camping, after reserving the Group Campsite you may make arrangements with the Campground Staff:
[email protected]
to use an equivalent value of campsites in the Family Camp area at no additional cost,
when available.

2. Reserve the Observatory

Email the Observatory at
[email protected] with your name, phone number, preferred dates,
and a brief description
of your group.

You will receive a call back to discuss the reservation, plan any special program features for your group, and take your credit card information for the reservation.

b) The Observatory should be reserved at least two weeks in advance of your event.

c) Cancellations must be made at least 48 hours prior to the event.

In the event of a cancellation, a rain check will be provided if weather is likely to make observing impossible. Observatory docents provide a program which is entertaining and informative regardless of weather conditions.
Refunds are not provided.

d) Observatory rentals are limited to private events to which the general public is not invited.

If you are interested in conducting a public event at the observatory, please leave a message with a description of the proposed event and your name, phone number, and preferred dates.


Observatory Fee: $165
Park Campground Fee: $165
Total: $330

Daytime Astronomy: $100

Rescheduling Fee: $15

Best Times

The dates near the New Moon are very popular (when skies are darkest and astronomical objects aren't washed out by moonlight).

We also have groups reserve us to specifically observe the Moon during quarter phases.


Rent the Observatory

Give your guests an experience they'll never forget!

The Robert Ferguson Observatory is available
for private rentals.

Imagine having three beautiful telescopes and a cadre of knowledgeable docents ready to host your family, friends, school group, Scout Troop or other group—up to 50 people!

Our docents can tailor an evening to fit your needs and give you a night you'll never forget.

At left: M51, the "Whirlpool Galaxy" photographed
by RFO docents using our robotic telescope.


A large group campground is located adjacent to the Observatory.
It has a spitted barbeque pit, picnic tables for 50 guests, an area for tents, and adjacent parking large enough to accommodate RVs.
The PlanetWalk and other hiking trails are nearby.

Enjoy the quiet beauty of Sugarloaf Ridge State Park during the day and spend quality time with RFO telescopes until late at night—without having to drive home.

RFO Daytime Astronomy Program for Private Groups
Includes solar viewing, classroom presentation, observatory tour.

Imagine learning about our closest star and its solar system under the guidance of observatory docents. Your group can safely observe activity on our favorite star, the Sun, through the observatory's two solar telescopes (weather permitting). A classroom presentation for up to 45 people can be tailored to meet the interests of your group. The observatory tour covers three other types of telescopes in the observatory - a refractor, a 40" reflector, and a robotic telescope.

Depending on the interest and abilities of the group, a partial or full-length docent-led PlanetWalk hike can also be provided.
Please follow the directions in the right side bar under "2. Reserve the Observatory" to make a reservation for your group to enjoy a daytime astronomy program. The park campground fee is not required for events conducted between noon and 2 pm.

"You guys were awesome! Thank you so much. The kids not only had a lot of fun, but they learned a lot, too....That observatory really is a key to opening those young minds. Thank you."
—Clay (Cub Scout Pack 128, Sebastopol)