Caving Canada Canada’s Longest Caves Last Update February 2024
Longest
Completely or mostly underwater
Rank Cave Length (m) Depth (m) Prov Region Reference 1 Castleguard Cave 21311 388 AB Rockies CC 71; Christian Stener 2022 2 ARGO Cave System 18725 406 BC Vancouver Island Dennis Mitchell 2023 3 Yorkshire Pot 13812 389 AB/BC Rockies CC? 4 Weymer Cave System 11462 390 BC Vancouver Island CC 67:26; Martin Davis 2024-02 5 Thanksgiving Cave 8386 479 BC Vancouver Island Dennis Mitchell letter 2017 6 Ursa Major 8309 179 BC Vancouver Island Martin Davis 2024-02 7 Bisaro Anima 8110 683 BC Rockies Jeremy Bruns 2024 8 White Rabbit 7541 459 BC Monashee Mountains Kirk Safford 2023 9 Three Island Cave 6563 12 QC Ottawa River CC 57:6-8 10 Glory 'ole 6537 342 BC Vancouver Island Dennis Mitchell 2023 11 Heavy Breather System 6150 655 BC Rockies CC 63, CC 62:8 12 Gargantua 6001 286 AB/BC Rockies JSM 147:6 13 Raspberry Rising 5504 219 BC Rockies Christian Stenner 2020-12 14 Main Cave (Nakimu) 4500 257 BC Rockies CC-CEC 15 Windy Link Pot 4449 209 BC Vancouver Island Rob Countess 08/2001 16 Rat's Nest Cave 4003 245 AB Rockies UGM 17 Gervais Cave 3907 9 ON/QC Ottawa River CC 29(1):18-23 18 13th Avenue 3698 275 BC Vancouver Island BCC 30(3):33 19 Arctomys Cave 3496 536 BC Rockies CC 16(1):24-26 20 Fang Cave 3342 247 BC Rockies BCC? 21 Minigill Cave System 3162 35 BC Vancouver Island Rob Countess 1/2005, BCC 13(1):19 22 Ice Trap 3002 347 AB Rockies Greg Horne 2012 23 Wormhole 2792 93 BC Vancouver Island CC 67:30 24 Cadomin Cave 2791 220 AB Rockies CC 14:19 25 Redemption Cave 2346 199 BC Caribou Mountains JSM 157:4-5 26 Grotte de Boischatel 2300 0 QC Quebec CC-CEC 27 Over The Hill Cave 2277 125 BC Monashee Mountains Kirk Safford 2023-01 28 Pellucidar Cave 2046 106 BC Vancouver Island Dennis Michell 2019-01 29 Leopard Frog Cave 1966 25 ON Bruce Peninsula Marcus Buck 3/2001 30 Lost Light System 1930 95 AB Rockies Greg Horne 2008 31 Across the River 1914 5 ON 0 CC 65:9 32 Grotte Valerie 1900 0 NWT Nahanni CC-CEC 33 Q5 Cave 1867 301 BC Vancouver Island CC 16(1):21 34 Porcupine Cave 1794 100 BC Rockies CC 21(1):36-38 35 Wet Dream (Nomash River Cave) 1710 45 BC Vancouver Island CC84:22-23 36 Reappearing River 1640 77 BC Vancouver Island Richard Jack 3/2023 37 Dewdney's Caves 1610 4 ON Southern Ontario Marcus Buck 3/2002 38 Mystery Cave 1590 ? BC Vancouver Island Peter Curtis 2022; BCC 2023 39 Coral Cave 1455 104 BC Vancouver Island CC-CEC 40 Blak T 1417 89 BC Vancouver Island CC 62:19 41 Hollow Cave 1412 36 BC Vancouver Island Bill Bourdillon, 1/2005 (posthumously) 42 Vanishing Point 1380 99 BC Vancouver Island 0 43 Cold Rock To Go 1370 64 BC Vancouver Island CC 21(2):17-25 44 White Hole 1320 253 BC Rockies CC 17:48-73 45 Tajomne Bisaro 1312 96 BC Rockies Vlad Paulik 2019-11 46 Cody Cave 1308 57 BC Rockies CC 28(1):11-13 47 Big Money Cave 1303 230 BC Vancouver Island CC 62:28 48 Quatsino Cave 1260 152 BC Vancouver Island CC-CEC 49 Moira Cave 1200 13 ON Southern Ontario 0 50 Maiden Grace 1199 91 BC Vancouver Island BCC 21(3) 51 Marshswallow 1196 82 BC Vancouver Island CC 59:30 52 Dreamtime 1195 83 BC Vancouver Island CC 28(1):36-39 53 Callis Cave 1189 0 ON Southern Ontario James Sled 7/2001 54 Close To The Edge 1153 472 BC Rockies CC 58:13; Dan Green 2024 55 Meadow Cave 1135 175 BC Rockies CC 30(1):24-28 56 Long After Dark 1108 89 BC Vancouver Island 0 57 Paradise Lost 1090 61 BC Vancouver Island CC 22(1):17-19 58 Solstice Shower Shaft 1087 101 BC Vancouver Island Dennis Mitchell letter 2017 59 Cascade Cave 1068 103 BC Vancouver Island CC-CEC 60 Grotte Andrée 1045 0 NWT Nahanni CC-CEC 61 Booming Ice Chasm 961 179 AB Rockies Nick Vieira 2013 62 Whistling Cave 919 78 BC Vancouver Island Martin Davis Nov. 2013 63 Lost Richard 895 47 BC Vancouver Island BCC 25(1):11/12 64 Ptarmigan Cave 890 318 BC Rockies CC 31(1):20-25 65 Foramen Magnum 888 127 BC Vancouver Island Trevor Moelaert 2014 66 Grotte de Saint-Casimir 869 2 QC 0 0 67 Tripartight 820 271 BC Rockies CC 62:8 68 Phreatic Follies 809 51 BC Vancouver Island CC 21(2):17-25 69 Grueling Cave 789 153 BC Vancouver Island Dennis Mitchell letter 2017 70 Moon River Cave 774 142 BC Rockies CC 20(1):7-12 71 Black Hole 740 0 BC Vancouver Island CC 10(1):8-22 72 Canyon Creek Ice Cave 727 89 AB Rockies CC 8(2):32-36 73 Krog's Kavern 713 143 BC Vancouver Island Quagger Update notes 2018-01 73 Teawater Cave 713 52 BC Vancouver Island Trevor Moelaert 11/2003 75 Dezaiko Cave 710 253 BC Rockies CC 18(1):4-10 76 Rockfalls Syphon Cave 692 37 BC Vancouver Island BCC 77 Euclataws Cave 666 111 BC Vancouver Island CC-CEC; min est incl. HLC 2024-02 78 Bath-Gorge Caves 656 25 BC Vancouver Island CC 30(2):42-44 79 Her Majesty's Cave 634 0 BC Rockies CC 23(1):6-8 80 Bottom's Up 631 78 BC Vancouver Island CC 20(1):36-39 81 Sexy Beast 626 46 BC Rockies CC 66:16 82 China Rabbit 624 147 BC Monashee Mountains Kirk Safford 2022 82 Pozu Del Piton 624 59 BC Vancouver Island BCC 9(5):15 84 Larch Valley Cave 611 39 BC Rockies CC 23(1):3-5 85 Pinto Lake Cave 610 123 AB Rockies CC 11(2):19-23 86 Siren Song 608 159 BC Caribou Mountains BCC 26(1) 20/21 87 Spare Change Cave 585 72 BC Vancouver Island Trevor Moelaert 1/2005 88 Skull Creek Cave 584 0 BC Vancouver Island BCC 89 Gusting Cave 581 53 BC Vancouver Island CC 21(2):17-25 90 F1 Resurgence Cave 570 30 BC Rockies CC 22(1):41 91 Caverne Laflèche 563 31 QC Outaouais CC-CEC 92 Tsulton Rising 559 42 BC Vancouver Island BCC 11(1):13 93 Grotte de Lorraine 556 0 QC Terrebonne CC-CEC 94 Gleason Creek Resurgence 555 28 BC Rockies BCC 8(6):6 95 Riverbend Cave - Lower Cave 551 68 BC Vancouver Island CC94 96 McRitchie Cavern 549 123 BC Rockies CC 69:20 97 Y2Kave 543 43 BC Vancouver Island BCC 16(1):24 98 Wapiabi Cave 540 152 AB Rockies CC 9(1):25-28 98 Little Moscow 540 96 BC Rockies CC 20(1):3-5 100 Dud Cave 539 37 BC Vancouver Island Trevor Moelaert 1/2006