United States » Apopka Blue Sink

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Rated 3.1/5 stars (498 ratings)

Overview Location & Specifics Conditions Resources Nearby Systems  
Portions of the following information were taken from the Cambrian Foundation

Apopka Blue Sink lies in the forest on the outskirts of the City of Apopka, about 12 miles northwest of Orlando. As is the unfortunate case for many sinkholes, this karst window has become the repository for litter, trash, and other waste. Thanks to The Cambrian Foundation for removing the debris from the bottom of the sink. Garbage removed included a burned sofa, Christmas trees, a car engine block, bottles, fencing, etc.

Apopka Blue Sink is home to a species of aquatic cave crayfish known only to this system, the Orlando spider cave crayfish (Troglocambarus sp.). Given the rare species that rely on these habitats for survival, maintaining these karst environments free of litter and external debris is critical to their success.
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Latitude: 28.75168
Longitude: -81.52081
Coordinate System:
Maximum Depth: 110'
 Cave Diving
 Cavern Diving
 Open Water Diving
Date Submitter Visbility Remarks
5/21/2024 Josh N/a I also contacted the city years ago and had no response. Iím happy to help with the lawnmower and any efforts to get the hole cleaned up AND recognized for what it is. Please contact me Iím available this weekend! Letís get this mower out at least. Would happily act as a support diver for any efforts/exploration as well. Josh.leavell@gmail.com
4/4/2024 Robert Ryan Not Good. Major dead oak trees have fallen in. I received some complaints about trespassing and illegal activity on the City's property just north of Bluegrass Estates. There has been some spill over effect on BGE. As you probably know, there is a famous sinkhole called the Blue Sink on the city's property. I'm currently soliciting the City of Apopka to properly maintain the Blue Sink area including stopping trespassers. The city expects us to maintain our property, so I expect the city to do the same for city property. The Blue Sink area has been neglected by the city for the last 21 years. The Cambrian Foundation did a major clean up back in 2003. I contacted Cambrian Foundation about the Blue Sink and they responded back saying they would like to be involved in the Blue Sink clean up again.
7/30/2023 Katy clear Came here to pick up trash (lots of it) seated lawn mower trashed in the sink... Need help getting it out.
7/3/2023 Mark thrush fair help needed some one has jumped a riding lawn mower in blue hole. I got a rope on it. but it has slipped in under the edge. also 6 months ago the massive oak tree above the hole lost a branch and the hole is covered
7/19/2021 Josh 2-5 Visited in 2019 to check if reports of being filled in were true, found nothing but a great depression at the GPS marker that looked like it could have been a filled-in Apopka Blue. Returned today after the last post saying it was not filled in, all I will say is that it is indeed NOT filled in, the GPS marker is incorrect. Extreme thunderstorm prevented any recon but I could see beautiful blue water going under the large limestone overhang.
6/30/2021 Andrew None The hole is in fact not filled in
4/7/2021 PJ 0 Totally filled in and no longer exists. Proof: https://youtu.be/17gFkslpztA https://youtu.be/-hXao2OIIp0
8/23/2017 Matt None Went to check out the hole today... completely filled in. Disappointed to say the least.
8/23/2017 Matt None Went to check out the hole today... completely filled in. Disappointed to say the least.
6/17/2015 Justin 50 ft Both the upstream and downstream sections are filled in with debris and sand. Sidemount might be possible downstream, but still very tight.
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Description Type Date Author Remarks
 Home Page Web Site
 System Map Map 1997 Andy Pitkin
 System Map #2 Map 1994 Dean Derk
 System Map #3 Map 1982 Bill Oigarden
Sslect Search Radius:
System Depth Cave Cavern OW Last Report Distance (mi)
 Overview Information Available for Rock Springs  Rock Springs 25 True False False 1/28/2011 1.2
 Overview Information Available for Sanlando Spring  Sanlando Spring 45 True True False 8.8