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
5 months		 14 24.5
(22.8)
2 The Dimond Canyon Water Gap by oaklandgeology
Alameda county, CA		 4 years
3 months		 23 18.6
(17.8)
3 HFS #6: The Swerve - San Lorenzo Creek by jagerdorf
Alameda county, CA		 12 years
6 months		 73 17.1
(16.9)
4 HFS #11: More Than a Simple Curb Offset by jagerdorf
Alameda county, CA		 12 years
5 months		 73 17.1
(16.9)
5 HFS #10: Hayward Fault Rift Zone – ADA Accessible by jagerdorf
Alameda county, CA		 13 years
9 months		 81 17.0
(16.8)
6 St. James Street Slickensides by oaklandgeology
Alameda county, CA		 4 years
3 months		 25 17.0
(16.4)
7 Rosemary, thyme, basal, sanadine, & rhyolite by jagerdorf
Alameda county, CA		 16 years
3 months		 100 16.3
(16.1)
8 Caldecott “Orinda Formation”Weathering Earthcac by PathfinderMark
Alameda county, CA		 16 years
3 months		 106 15.3
(15.2)
9 HFS #5: Downtown Hayward Walking Tour by jagerdorf
Alameda county, CA		 12 years
6 months		 84 14.9
(14.8)
10 Fremont - Mission Peak EarthCache by AMobious
Alameda county, CA		 11 years
7 months		 80 14.5
(14.3)
11 Hayward Fault Series #9: Montclair Two Stop by jagerdorf
Alameda county, CA		 12 years
5 months		 92 13.5
(13.4)
12 Serpentine Prairie by oaklandgeology
Alameda county, CA		 4 years
3 months		 32 13.4
(13.0)
13 Landslide by the Dry Creek 🍂 by Psychoticjesters
Alameda county, CA		 11 years
10 months		 95 12.5
(12.3)
14 Claremont Ribbon Chert by Wandering Ron
Alameda county, CA		 16 years
4 months		 140 11.7
(11.6)
15 Keratophyre rock type by jagerdorf
Alameda county, CA		 7 months 6 11.0
(9.47)
16 HFS #4: Holy Sepulchre Cemetery-It is Alive by jagerdorf
Alameda county, CA		 12 years
2 months		 113 10.8
(10.7)
17 Mission Peak Landslide by FiveEyes
Alameda county, CA		 7 years 68 10.3
(10.2)
18 Hayward Fault - Fremont by bluesnote
Alameda county, CA		 9 years
10 months		 98 10.0
(9.94)
19 SFBWR Serpentinite's Glow Earthcache by PathfinderMark
Alameda county, CA		 15 years
8 months		 166 9.47
(9.41)
20 Rusty Rocks, or Fallen Meteorites from Mars? ♂ by Psychoticjesters
Alameda county, CA		 11 years
8 months		 127 9.19
(9.12)
21 SFBWR Buckshot or Cannonballs? Earthcache by PathfinderMark
Alameda county, CA		 15 years
8 months		 171 9.19
(9.14)
22 Oakland streets via Bilger Quarry by Unit33
Alameda county, CA		 8 years
10 months		 103 8.64
(8.56)
23 HFS #7: Simple Curb Offset & Alquist-Priolo Act by jagerdorf
Alameda county, CA		 12 years
5 months		 145 8.59
(8.53)
24 Evolution of Pleasanton Topology by nozy nabor
Alameda county, CA		 8 years
9 months		 105 8.39
(8.31)
25 HFS #3: Hayward Fault Tule Pond Sag Structure by jagerdorf
Alameda county, CA		 12 years
6 months		 152 8.27
(8.22)
26 Flavorful Flats -- Harvesting Ocean Salinity by 1962penny
Alameda county, CA		 4 years
4 months		 54 8.04
(7.89)
27 Calaveras Fault Landslide by UV980
Alameda county, CA		 4 years
5 months		 58 7.61
(7.48)
28 SFBWR Salt Pond Levee Earthcache by PathfinderMark
Alameda county, CA		 15 years
8 months		 212 7.41
(7.38)
29 HFS #1: Who used up all the Agua Caliente? by jagerdorf
Alameda county, CA		 12 years
6 months		 182 6.91
(6.87)
30 Del Valle Erosion by KG GeoCachers
Alameda county, CA		 5 years
5 months		 86 6.35
(6.28)
31 Hayward Fault at Fremont's Central Park by avtanski
Alameda county, CA		 19 years 310 6.14
(6.12)
32 Fault Creep - California Memorial Stadium by Chet13
Alameda county, CA		 5 months 7 6.10
(5.34)
33 Lake Merritt and Oakland Geomorphology by oaklandgeology
Alameda county, CA		 1 year 18 5.99
(5.68)
34 HFS #2: Civic Center Tectonic Hill by jagerdorf
Alameda county, CA		 12 years
5 months		 237 5.26
(5.24)
Total records: 34
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Statistics last updated Tuesday, 16 June 2026 05:36:51 Eastern Daylight Time
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