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
4 months		 14 24.4
(22.7)
2 The Dimond Canyon Water Gap by oaklandgeology
Alameda county, CA		 4 years
3 months		 23 18.5
(17.7)
3 HFS #6: The Swerve - San Lorenzo Creek by jagerdorf
Alameda county, CA		 12 years
5 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
2 months		 25 17.0
(16.3)
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
2 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
9 months		 95 12.4
(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 10.8
(9.27)
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
9 months		 98 10.0
(9.93)
19 SFBWR Serpentinite's Glow Earthcache by PathfinderMark
Alameda county, CA		 15 years
8 months		 166 9.46
(9.40)
20 Rusty Rocks, or Fallen Meteorites from Mars? ♂ by Psychoticjesters
Alameda county, CA		 11 years
7 months		 127 9.18
(9.11)
21 SFBWR Buckshot or Cannonballs? Earthcache by PathfinderMark
Alameda county, CA		 15 years
8 months		 171 9.18
(9.13)
22 Oakland streets via Bilger Quarry by Unit33
Alameda county, CA		 8 years
10 months		 103 8.63
(8.55)
23 HFS #7: Simple Curb Offset & Alquist-Priolo Act by jagerdorf
Alameda county, CA		 12 years
5 months		 145 8.58
(8.52)
24 Evolution of Pleasanton Topology by nozy nabor
Alameda county, CA		 8 years
9 months		 105 8.37
(8.29)
25 HFS #3: Hayward Fault Tule Pond Sag Structure by jagerdorf
Alameda county, CA		 12 years
6 months		 152 8.26
(8.21)
26 Flavorful Flats -- Harvesting Ocean Salinity by 1962penny
Alameda county, CA		 4 years
3 months		 54 8.01
(7.87)
27 Calaveras Fault Landslide by UV980
Alameda county, CA		 4 years
4 months		 58 7.59
(7.46)
28 SFBWR Salt Pond Levee Earthcache by PathfinderMark
Alameda county, CA		 15 years
8 months		 212 7.41
(7.37)
29 HFS #1: Who used up all the Agua Caliente? by jagerdorf
Alameda county, CA		 12 years
6 months		 182 6.90
(6.86)
30 Del Valle Erosion by KG GeoCachers
Alameda county, CA		 5 years
5 months		 86 6.34
(6.27)
31 Hayward Fault at Fremont's Central Park by avtanski
Alameda county, CA		 19 years 310 6.13
(6.11)
32 Lake Merritt and Oakland Geomorphology by oaklandgeology
Alameda county, CA		 1 year 18 5.92
(5.61)
33 Fault Creep - California Memorial Stadium by Chet13
Alameda county, CA		 5 months 7 5.91
(5.17)
34 HFS #2: Civic Center Tectonic Hill by jagerdorf
Alameda county, CA		 12 years
5 months		 237 5.26
(5.23)
Total records: 34
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Statistics last updated Thursday, 11 June 2026 04:29:30 Eastern Daylight Time
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