Cave entrance
Cenote Mayan Blue
Training drills permitted on listed lines: CREER approved cave training site [2] (A Tunnel, B Tunnel, Mayas Two line to Hostage Hall jump, Dead Zone to the halocline depth change.). These categories are the named scheme's own; they describe the training a site calls for.
A cave-diving entrance to the Naranjal-Mayan Blue section of Sistema Ox Bel Ha, used as a designated CREER training site and, since 2020, as the trial cave for an information-rich line-marking system.
Mayan Blue gives access to the Maya Blue section of Sistema Ox Bel Ha; QRSS reported in 2020 that the Regina section connects to Ox Bel Ha through a deep area between the Regina and Maya Blue sections, and CINDAQ credits Jim Coke with early exploration of Naranjal-Mayan Blue. It is a cave-diving site rather than a guided cavern-tour site: it does not appear on CREER's list of cenote levels for single-tank cavern tours.
Several of its lines are approved CREER training locations: the A and B tunnels, the Mayas Two line up to the Hostage Hall jump and the Dead Zone up to the depth change at the halocline.
Since a community vote, Mayan Blue has carried a trial marking system in which arrows show the passage name and the distance to the exit, right-hand jumps are marked with green arrows, left-hand jumps with red arrows, and white arrows mark jump starts and other points. In 2024 the trial arrows were replaced with larger red, green and white arrows, and CREER put extending the system to Ponderosa, Tajma Ha, Jailhouse and Cristal/Naharon to a community vote.
The environment
Cave passages with a halocline in deeper sections such as the Dead Zone, according to CREER training rules.
Every fact on this page, with its source (8)
| Fact | Status | Source |
|---|---|---|
| QRSS reported in July 2020 that Regina connected to Ox Bel Ha through a deep area between the Regina and Maya Blue sections. | Verified | [4] |
| CINDAQ credits Jim Coke with early exploration of Naranjal-Mayan Blue. | Verified | [7] |
| CREER's training rules list the Mayan Blue A Tunnel, B Tunnel, Mayas Two line up to the Hostage Hall jump and Dead Zone up to the depth change at the halocline as approved training locations.Rules dated 2020-12-14. | Verified | [2] |
| Mayan Blue does not appear on CREER's list of rated cenotes for guided cavern tours.Absence from the list viewed 2026-10-14. | Verified | [1] |
| The Mayan Blue marking system labels arrows with passage names and distance to exit, uses green arrows for right-hand jumps, red for left-hand jumps and white for jump starts and other points; larger arrows were installed in 2024. | Verified | [5] [6] |
| In April 2024 CREER proposed extending the marking system to Ponderosa, Tajma-Ha, Jailhouse and Cristal/Naharon, subject to a community vote.Outcome of the vote not verified. | Verified | [6] |
| CREER's training rules and 2024 line-marking work show Mayan Blue in active use for cave diving and training; no published entry rules were found. | Verified | [2] [6] |
| CREER says single-tank cavern diving is allowed only at designated cavern sites under a qualified local guide, and that divers without cave training must not be taken into the cavern zone of caves that are not designated cavern tour sites.CREER guidance dated 2025-06-20. | Verified | [3] |
Verified: stated by an official or primary source we opened. Reported: from a secondary source only. Sources conflict: the note gives both versions. May be out of date: the newest source we found is old.
Written in our own words from the sources above. Report a correction