Loneliest Earthcaches
Alameda county
California

Total records: 34
Rank Geocache Age Finds cCP
(nfCP)
1 Joaquin Miller Park Geology Tour by 1962penny
Alameda county, CA		 3 years
6 months		 14 25.3
(23.7)
2 HFS #6: The Swerve - San Lorenzo Creek by jagerdorf
Alameda county, CA		 12 years
7 months		 73 17.3
(17.1)
3 HFS #11: More Than a Simple Curb Offset by jagerdorf
Alameda county, CA		 12 years
7 months		 73 17.3
(17.0)
4 HFS #10: Hayward Fault Rift Zone – ADA Accessible by jagerdorf
Alameda county, CA		 13 years
11 months		 82 17.0
(16.8)
5 The Dimond Canyon Water Gap by oaklandgeology
Alameda county, CA		 4 years
4 months		 26 16.9
(16.3)
6 Rosemary, thyme, basal, sanadine, & rhyolite by jagerdorf
Alameda county, CA		 16 years
4 months		 100 16.4
(16.2)
7 St. James Street Slickensides by oaklandgeology
Alameda county, CA		 4 years
4 months		 27 16.2
(15.6)
8 Caldecott “Orinda Formation”Weathering Earthcac by PathfinderMark
Alameda county, CA		 16 years
4 months		 106 15.5
(15.3)
9 HFS #5: Downtown Hayward Walking Tour by jagerdorf
Alameda county, CA		 12 years
8 months		 85 14.9
(14.7)
10 Fremont - Mission Peak EarthCache by AMobious
Alameda county, CA		 11 years
8 months		 81 14.5
(14.3)
11 Serpentine Prairie by oaklandgeology
Alameda county, CA		 4 years
4 months		 32 13.8
(13.4)
12 Hayward Fault Series #9: Montclair Two Stop by jagerdorf
Alameda county, CA		 12 years
6 months		 92 13.6
(13.5)
13 Keratophyre rock type by jagerdorf
Alameda county, CA		 9 months 6 13.1
(11.2)
14 Landslide by the Dry Creek 🍂 by Psychoticjesters
Alameda county, CA		 11 years
11 months		 96 12.5
(12.3)
15 Claremont Ribbon Chert by Wandering Ron
Alameda county, CA		 16 years
5 months		 141 11.7
(11.6)
16 HFS #4: Holy Sepulchre Cemetery-It is Alive by jagerdorf
Alameda county, CA		 12 years
4 months		 113 10.9
(10.8)
17 Mission Peak Landslide by FiveEyes
Alameda county, CA		 7 years
1 month		 68 10.5
(10.4)
18 Hayward Fault - Fremont by bluesnote
Alameda county, CA		 9 years
11 months		 98 10.2
(10.1)
19 SFBWR Serpentinite's Glow Earthcache by PathfinderMark
Alameda county, CA		 15 years
10 months		 166 9.54
(9.48)
20 Rusty Rocks, or Fallen Meteorites from Mars? ♂ by Psychoticjesters
Alameda county, CA		 11 years
9 months		 127 9.29
(9.22)
21 SFBWR Buckshot or Cannonballs? Earthcache by PathfinderMark
Alameda county, CA		 15 years
10 months		 171 9.26
(9.21)
22 Oakland streets via Bilger Quarry by Unit33
Alameda county, CA		 9 years 104 8.68
(8.60)
23 HFS #7: Simple Curb Offset & Alquist-Priolo Act by jagerdorf
Alameda county, CA		 12 years
6 months		 145 8.67
(8.61)
24 Evolution of Pleasanton Topology by nozy nabor
Alameda county, CA		 8 years
11 months		 105 8.50
(8.42)
25 HFS #3: Hayward Fault Tule Pond Sag Structure by jagerdorf
Alameda county, CA		 12 years
8 months		 152 8.35
(8.30)
26 Flavorful Flats -- Harvesting Ocean Salinity by 1962penny
Alameda county, CA		 4 years
5 months		 54 8.26
(8.11)
27 Calaveras Fault Landslide by UV980
Alameda county, CA		 4 years
6 months		 59 7.69
(7.56)
28 SFBWR Salt Pond Levee Earthcache by PathfinderMark
Alameda county, CA		 15 years
10 months		 212 7.47
(7.43)
29 HFS #1: Who used up all the Agua Caliente? by jagerdorf
Alameda county, CA		 12 years
8 months		 182 6.98
(6.94)
30 Fault Creep - California Memorial Stadium by Chet13
Alameda county, CA		 6 months 8 6.88
(6.11)
31 Del Valle Erosion by KG GeoCachers
Alameda county, CA		 5 years
7 months		 86 6.50
(6.42)
32 Hayward Fault at Fremont's Central Park by avtanski
Alameda county, CA		 19 years
1 month		 311 6.16
(6.14)
33 Lake Merritt and Oakland Geomorphology by oaklandgeology
Alameda county, CA		 1 year
2 months		 21 5.72
(5.46)
34 HFS #2: Civic Center Tectonic Hill by jagerdorf
Alameda county, CA		 12 years
7 months		 237 5.31
(5.29)
Total records: 34
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Statistics last updated Friday, 31 July 2026 05:27:08 Eastern Daylight Time
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