Nature reserve · California
Isacson
Marked no entry. Do not count on getting in.
Isacson is a nature reserve in California, at a modelled elevation of 849 m. Mount Umunhum stands 1,063 m to the east-southeast, 12 miles off. The nearest named place is Mount Bielawski, a peak 0.6 miles away.
What to expect
- Operated by
- Sempervirens Fund
How to reach it
Coordinates37.21483, -122.09670
Named places within 25 miles
Peaks
- Mount Bielawski: 0.6 mi
- Castle Rock: 0.9 mi
- Goat Rock: 1.1 mi
- Indian Rock: 1.2 mi
- The Peak: 1.4 mi
Nature reserves
- San Lorenzo Headwaters Natural Preserve: 1.1 mi
- Stevens Canyon Ranch: 4.1 mi
- Upper Stevens Creek County Park: 5.0 mi
- Stevens Creek County Park: 5.7 mi
- St. Joseph's Hill Open Space Preserve: 6.2 mi
Picnic sites
- LCCC Picnic Area: 1.7 mi
- Cathedral Grove: 2.8 mi
- Longbridge: 2.8 mi
- Redwood Grove: 2.8 mi
- Cooley: 4.7 mi
Historic sites
- Castle Rock State Park Donor Memorial: 1.9 mi
- Remains of an old cabin: 2.0 mi
- William Campbell's sawmill: 2.8 mi
- Dedication Circle: 3.6 mi
- Otogawa Roshi: 5.1 mi
Museums
- Youth Science Institute Sanborn: 2.2 mi
- Saratoga Historical Park: 4.7 mi
- Forbes Mill Museum: 6.4 mi
- New Museum of Los Gatos: 6.5 mi
- The San Lorenzo Valley Museum: 6.9 mi
Parks
- Saratoga Springs: 2.8 mi
- Quarry Park: 3.6 mi
- Wildwood Park: 4.5 mi
- Stevens Creek Park: 4.6 mi
- Garrahan Park: 4.7 mi
Attractions
- Castle Rock State Park. Old Corral Day Use Area: 3.3 mi
- Castle Rock State Park. Red Mountain Day Use Area: 3.4 mi
- Alma Culture Landscape: 5.7 mi
- W.E. "Bill" Mason Carousel: 6.9 mi
- Fujitsu Planetarium: 7.7 mi
Gardens
- Nature Circle: 3.6 mi
- Hakone Gardens: 4.0 mi
- Italianate Garden: 4.3 mi
- Phelan Cacti Garden: 4.3 mi
- Saratoga Community Garden: 7.0 mi
Artworks
- The Greatest in the Kingdom: 4.7 mi
- Praying Hands: 4.8 mi
- The Cats: 6.0 mi
- Portals and Passages: 6.5 mi
- Eolian: 6.5 mi
Beaches: 59
- Cable Car Beach: 12.9 mi
- Waddell Beach (State Parks): 13.0 mi
- Waddell Beach (County of Santa Cruz): 13.0 mi
- Las Trancas Beach: 13.1 mi
- Greyhound Rock Beach: 13.2 mi
Waterfalls: 24
- Castle Rock Falls: 0.9 mi
- Gerow's Waterfall: 5.1 mi
- Peter's Creek Falls: 6.5 mi
- Sempervirens Falls: 6.7 mi
- Tip Toe Falls: 7.2 mi
Springs: 18
- Travertine Springs: 3.0 mi
- Congress Springs: 3.1 mi
- Bulls Spring: 5.6 mi
- Spring source: 7.7 mi
- Cherry Springs: 10.2 mi
Cliffs: 12
- Underworld Rock: 0.8 mi
- Lyme Disease Rock: 0.9 mi
- Graffiti Rock: 4.4 mi
- Waddell Bluffs: 13.0 mi
- China Ladder: 13.4 mi
Covered bridges: 2
- Felton Covered Bridge: 11.4 mi
- Felton Covered Bridge: 11.4 mi
Lighthouses: 2
- Santa Cruz West Breakwater Light: 18.3 mi
- Santa Cruz Lighthouse: 18.6 mi
Natural arches: 1
- Natural Bridges Rock Arch: 18.5 mi
Summits around it
The highest named summits within 11.6 miles of Isacson. Elevation from each summit’s own record; bearing measured between the two coordinates.
| Summit | Bearing | Elevation | Distance |
|---|---|---|---|
| Mount Umunhum | ESE 109° | 1,063 m | 11.5 mi |
| Mount Thayer | ESE 110° | 1,061 m | 10.4 mi |
| Mount Bielawski | NNE 18° | 985 m | 0.6 mi |
| Castle Rock | N 2° | 979 m | 0.9 mi |
| The Peak | ENE 78° | 917 m | 1.4 mi |
| El Sombroso | ESE 104° | 917 m | 10.6 mi |
| Lookout Tower | NNW 342° | 892 m | 2.3 mi |
| Goat Rock | NNW 326° | 890 m | 1.1 mi |
When to go
Light through the year
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:13 | 18:46 | 19:21 |
| June solstice | 05:49 | 19:54 | 20:33 |
| September equinox | 06:57 | 18:33 | 19:07 |
| December solstice | 07:19 | 16:15 | 16:55 |
Local time (America/Los_Angeles).
Climate normals
Months averaging 50–80 °F: Feb–Nov.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °F | 49 | 52 | 55 | 58 | 62 | 67 | 70 | 70 | 68 | 62 | 54 | 49 |
| Precip in | 5.0 | 4.9 | 3.4 | 1.4 | 0.5 | 0.1 | 0.0 | 0.0 | 0.0 | 0.8 | 2.0 | 4.0 |
1991–2020 U.S. Climate Normals, NOAA NCEI — LOS Gatos, 8 mi away.
Where this comes from
Location and category confirmed against OpenStreetMap.
OpenStreetMapOpenStreetMap element way/479793461
Day trips start here
- Santa Cruz · 17 mi
- Capitola · 18 mi
- Aptos · 19 mi
- Watsonville · 27 mi
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