Blackstone Canyon
Source: Marin County Parks
Marinwood
Tuesday, December 23, 2025, 10am – 12pm
Get out for a brief breath of fresh air before the holidays! This secluded valley below the rugged east end of Big Rock Ridge is a great place for a creek-side walk. We’ll take a short, slow stroll as we explore the lush flora, look for amphibians and other aquatic creatures, and keep an eye out for birds flitting through the understory. There’s little elevation change but the trail is narrow, rutted in places, and may be wet in spots. It can be surprisingly cold here in the morning so be sure to bring warm layers. Total miles: 1.5. No pets are allowed, except for service/companion animals. Adverse weather or poor air quality may cancel. Registration is required.
Questions: Contact Shannon Burke
Directions: Meet at the end of Valleystone Dr in San Rafael. From Highway 101 in San Rafael take the Marinwood St Vincent’s Dr exit, west on Miller Creek Rd 0.3 miles. Turn right onto Las Gallinas Ave 0.4 miles, then left onto Blackstone Dr 0.2 miles. Stay left and follow Valleystone Dr, park at end.
Sponsor: Parks
Accommodation Information: If you are a person with a disability and require an accommodation to participate in a County program, service, or activity, requests may be made by calling 415-473-4381 (Voice), Dial 711 for CA Relay, or by submitting a Disability Accommodation Request at least five business days in advance of the event. We will do our best to fulfill requests received with less than five business days’ notice. Copies of documents are available in alternative formats upon request.
Tuesday, December 23, 2025, 10am – 12pm
Get out for a brief breath of fresh air before the holidays! This secluded valley below the rugged east end of Big Rock Ridge is a great place for a creek-side walk. We’ll take a short, slow stroll as we explore the lush flora, look for amphibians and other aquatic creatures, and keep an eye out for birds flitting through the understory. There’s little elevation change but the trail is narrow, rutted in places, and may be wet in spots. It can be surprisingly cold here in the morning so be sure to bring warm layers. Total miles: 1.5. No pets are allowed, except for service/companion animals. Adverse weather or poor air quality may cancel. Registration is required.
Questions: Contact Shannon Burke
Directions: Meet at the end of Valleystone Dr in San Rafael. From Highway 101 in San Rafael take the Marinwood St Vincent’s Dr exit, west on Miller Creek Rd 0.3 miles. Turn right onto Las Gallinas Ave 0.4 miles, then left onto Blackstone Dr 0.2 miles. Stay left and follow Valleystone Dr, park at end.
Sponsor: Parks
Accommodation Information: If you are a person with a disability and require an accommodation to participate in a County program, service, or activity, requests may be made by calling 415-473-4381 (Voice), Dial 711 for CA Relay, or by submitting a Disability Accommodation Request at least five business days in advance of the event. We will do our best to fulfill requests received with less than five business days’ notice. Copies of documents are available in alternative formats upon request.