# Grand Teton National Park tourists might have been exposed to measles

> **Open Intelligence Dossier** · First detected: 2026-07-13 01:07 UTC · Category: Health

## Executive Summary
Teton County has declared a local emergency following a measles outbreak at Colter Bay Village in Grand Teton National Park.

## Intelligence Brief
A public health emergency has been declared in Teton County following a measles outbreak centered at Colter Bay Village. The Wyoming Department of Health has confirmed multiple cases of the virus, with the total number of confirmed cases for 2026 reaching four. The outbreak is specifically impacting Grand Teton National Park, where officials have warned visitors about the presence of the highly contagious virus in the air. The situation involves a chain of transmission that has led to the rapid identification of several infected individuals within the region. Coverage from the Wyoming Department of Health, Cap City News, and East Idaho News emphasizes the specific demographics and transmission patterns of the virus. Cap City News reports that the third confirmed case of measles occurred in an unvaccinated adult.


The Wyoming Department of Health has formally confirmed the third and fourth cases of 2026 through official government updates. Meanwhile, JHNewsAndGuide.com has focused on the operational response, noting that officials are actively sharing specific exposure windows related to the second recorded case in Teton County to help potential victims identify if they were at risk. This health crisis is particularly significant due to the high volume of tourists visiting Grand Teton National Park. According to AOL and TheTravel, the warning to visitors underscores the risk that tourists may have been exposed to the virus while visiting the park. The outbreak is linked to a single chain of transmission, according to the Buckrail, which suggests the virus spread from a common source or set of individuals. The involvement of Colter Bay Village as a focal point for the outbreak increases the potential for wide-scale exposure given its role as a hub for park visitors and travelers.


Looking ahead, officials will continue to monitor the situation as the statewide total of cases rises. The Wyoming Department of Health is expected to provide further updates as more cases are confirmed or as the exposure windows for the second case are further analyzed. Public health authorities are focusing on the risks associated with being unvaccinated, as seen in the third case reported by Cap City News. Monitoring will likely continue at Colter Bay Village and surrounding Teton County areas to determine if the chain of transmission has been broken or if additional tourists have been exposed to the airborne virus.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| Buckrail - Jackson Hole, news | County declares local emergency due to measles outbreak in Colter Bay | [Source Link](https://news.google.com/rss/articles/CBMilgFBVV95cUxQV3czNlBQTlJfSlFCSmRpZFNFU3Vwd1pkWTZ5ekdxUnJoSjI5M2lZWlVQSnpUQ2lORUJsZXRUbzZuZlRxYnNNcHUtM1lYS296VGJaOWxoWjFUb1A0MzFRS2FRV01JRlRlZE1MUVVzZUVFeHZQOXRkZ3paa0RMUU5VU3JFczlfakhCaWZkbE5ROUh1eC1pNnc?oc=5) |
| Local News 8 | Teton County Declares Local Emergency After Measles Outbreak at Colter Bay Village | [Source Link](https://news.google.com/rss/articles/CBMivwFBVV95cUxPdnAxeFJJcG9iWWVQa2dSVGd4OXJwWGlUVjNUS1Q3a0ZDUkNRclhHeEZwZ0FxemRjMzhyV2IyUTRFQjdMazAzZWE1YU9sQVJoX1YyUUZjcjE4bjZjcjF4QlQtZVRWRFBtQ0JqeTBNa3d5TExESlZuTk42VXhYNlFURUFYNW1nQXJhcFo2TlRwNlNVTzRfM2ZPQV9DMWRNVU1FRDE0aWVEdFdYUDdQaUVqNzg1c2RKemdxRDdKX2ZITQ?oc=5) |
| Buckrail - Jackson Hole, news | Teton County sees third case of measles in ‘same chain of transmission’ | [Source Link](https://news.google.com/rss/articles/CBMilgFBVV95cUxNU1hIaVFodEx1VU9CNU84N01MRkJrdTdpXzA2MkZhMTJJaUk4M1dOMGE3NnVUTFdsLWlNSERsUmtlNHFVLXUtbmVWcmduWG9zT09ZVllpbkNPbzkzTGEzc0JudGpMb1NMZm9MMURfR2ozOHk5X2tjQlZ6dWtEYXNVMVFwSDgtTmRQMGUtR1VlVEZKSm04VHc?oc=5) |
| Cap City News | Wyoming Department of Health confirms third case of measles in unvaccinated adult | [Source Link](https://news.google.com/rss/articles/CBMixAFBVV95cUxPSzRGR0oxbGNnQlNhRUJFSjZEcnBHa2Z6bWlVcTVUbkhRbnlWbUlDZEJmNEx2WnNIMTlLLTJfcG9maDRsNnAzLTQwNVhtazVJNlZESDYyQ2hNYWdERWduLXRlMDZWdkZmRngtN3pHQ1BSWmM1U1U5ZUM3NmVraHBkM2tVT29VRmFLVFJYVHZoMW5TNXNVbWgzWnN3Y011YXQwd0ZoSWI5UXRLd1NNempheXFqTE5FbUFUUXB5U2hQdHZyZG5s?oc=5) |
| Wyoming Department of Health (.gov) | Fourth Measles Case of 2026 Confirmed by Wyoming Department of Health | [Source Link](https://news.google.com/rss/articles/CBMimAFBVV95cUxPNG5VTi15MVN1RzVfM193SVl0LXdlZ3NJYjN5Z1lONVRDbW5hSl9MLWczbHZrWU11Rl9PT3RVZUNFaVJ0ZFJfVnNQUjZQZGVQTDN0SzJFclBmWHVRTVpwVnliZUpqaTJ6NGZQOWpRdmZsb255RFh4emhyaklETHJGc1pONDhYUmJHd0JWSnJrQVNTZmxoNE1wOQ?oc=5) |
| JHNewsAndGuide.com | Officials share exposure windows for 2nd measles case in Teton County | [Source Link](https://news.google.com/rss/articles/CBMi_AFBVV95cUxQaVpVNmtadkR2b0doOWxkMlk5bDl3OGc5dGZFc3pKRk1zekNDZ296QTQ4QlBXcnJ1Q00taGp4SGUwUlNIYVduZjV1WDkzSXhxYkdGSnBOMGstd3ZiYW5hTmVPZi1fbWNqeGM1WnZyQ2g3WXJvWk9jaHB4ZHdFRmh5OUNybkpxN1RpaXpYUFg4c0g0VzE1cVJvMmhqME5vOTlhRzhDbk9NTGdRS2JfUmxxZnBaR01VTnNZd2NpY1B6d21paEo1TmtoRjJvc1V4MDRQczZIbTY1ODlIcXdjRGNpc3daakw5emswSFRJUDRsTkdnbGVNaE5qNjRoWTc?oc=5) |
| JHNewsAndGuide.com | Second measles case recorded in Teton County | [Source Link](https://news.google.com/rss/articles/CBMi2wFBVV95cUxPU2lNelpXYnhobnpnQzc5MTZ6SFlmN3h1TG44UFFpTWdlU0NLWThMbHUtV0FwaFMtWldPZkY2UlpqbkUwSVZuOWpELXE1U3ZQNGpWTDdCclYtRzZmWlZKVF9ib0g4dndaa1EyTk9GWW5Cbk9KZHV4ZmZfRF9mSzZYdW03NEprN3hxNkExTk9pWHBrU204UUNiOVVJT3E4S2xUQ0xlNGZFZ1ZPRUJUcmR1cXNQZUxrUkJMZFdEc2lEWk5TZU9idGw1amY2NXkxNXJhMXFkazl4WUc5aG8?oc=5) |
| Wyoming Department of Health (.gov) | Third Measles Case of 2026 Confirmed by Wyoming Department of Health | [Source Link](https://news.google.com/rss/articles/CBMilwFBVV95cUxQamVUUFZLU0FsLUtvbXNiT3NHOEo2cnkycDRkd0tjY0FrclpXVU1FLTNSNG8wT0tZMkZWUWs5ZTJqYnZDSFRlUDVfMzZBN09jMlkxZmJYQ0VCcHowTHBOM2pJdG10S1pOLTFxLXdIZzd3d2JfSEZnanRZSFVQbTEyV08xcjZVWk5xV1ZsMU9qc2x5OFFkX0Jn?oc=5) |
| TheTravel | Grand Teton National Park Warns Visitors Of “Highly Contagious” Virus In The Air | [Source Link](https://news.google.com/rss/articles/CBMiswFBVV95cUxOSEI2RGIwSnAtSUd6dVlqVkVUREhUMkJRQ2xtQk90S0tIeDA2VHpoSmJGU1luWGlGRVAyWC1CNjllVlV4RXppRndBQU5aa0NtQ1BmXzFwOFR2WjFJZS1FMnF0QmtTTnNpRWNDNzFqeENHdFZuWi1wM29TSkN5RGl5a0xDY2ltYzlrQlFORVNVeEllUzdHbU5xMVNSWm1Hd0l4LXRjbnV2dXY1RmRXVEtYdDNoTQ?oc=5) |
| East Idaho News | Wyoming health officials confirm second measles case, possible exposure at Grand Teton Park | [Source Link](https://news.google.com/rss/articles/CBMiyAFBVV95cUxQYTVYdFVPTzk2WloxMWNPb29FVUtmNzJjc2ZEdUxQT1RpM2Z6eE1JZlNDb2w0UXVMUS1DcS1HWEJpVVk0QjQtM3ltQnd5RTFYcTd5Q0lhUXJSZEpaY1ZJVkRkbE1aUWV6X290bEp0SVNRbG9fNDZVbXRwOUFPcTc4TXhoalVFS2otQXhjRWZDb3BhdS1NeXc0MzR6QmpPX0lIMVVrUnhBUTE5c0FIeDJ6ZFNBSzRSaGxTeUM5bkFiTnJkdUJ6MVNfbw?oc=5) |
| Buckrail - Jackson Hole, news | Teton County’s second case of measles reported; statewide total now 3 | [Source Link](https://news.google.com/rss/articles/CBMikwFBVV95cUxQQ19oQ1FXclJCVUVnaXBpRE00OGdLcWV0REFpS0VzTG85U21sZUxzRTFJbEM5b3pTazhfMUFNUk1HamMzYlE3MUUtT0w0T1kwUE9wU0dwMG8yVUY2Zm5fUmtqUGhkTjBTT29MaGJVMlBoOUZkLVNhLWJsT0RMMDhyTjlPX2x0cUM0MFFPbUR6TFdtNWc?oc=5) |
| AOL.com | Grand Teton National Park tourists might have been exposed to measles | [Source Link](https://news.google.com/rss/articles/CBMihAFBVV95cUxNX3Y2YlJUU1MyS19ld0pyX2N4NnRMdmZ3Y25KZVI1WmFBTkE0alJhdEJ2TEdIdjdQRzhzcFhvT3phRTdCYnFwVTdSM1gwVi1WaE0zSVRCT2V0SUhFM1NUc1FvNjRsR2NsYmFZc3dIR0s0cUlabFNHc241VkEwME00cnFSalk?oc=5) |

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*Canonical Source: https://pulse.byoviral.com/trend/2026-07-13/grand-teton-national-park-tourists-might-have-been-exposed-to-measles*