# July 29, 1947 — Canyon Ferry, MT — 3′ Bright Disc Maneuvers at High Speed

**URL:** https://uapdiscovery.discourse.group/t/july-29-1947-canyon-ferry-mt-3-bright-disc-maneuvers-at-high-speed/601
**Category:** Blue Book Unknowns
**Created:** [July 28, 2026, 10:22pm UTC](https://uapdiscovery.discourse.group/t/july-29-1947-canyon-ferry-mt-3-bright-disc-maneuvers-at-high-speed/601 "2026-07-28T22:22:29Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)
#### Post date: [July 28, 2026, 10:22pm UTC](https://uapdiscovery.discourse.group/t/july-29-1947-canyon-ferry-mt-3-bright-disc-maneuvers-at-high-speed/601/1 "2026-07-28T22:22:29Z")

</div>

July 29, 1947 — Canyon Ferry, MT  
12:05 p.m. Robert J. Madden, Steve Herrmann, and Karl Herrmann see a thin object, apparently 3 feet in diameter, that hovers and flutters above Canyon Ferry, Montana (20 miles east of Helena), rising and descending. It heads northeast at tremendous speed at about 3,000 feet. [Eberhart]

Sources:  
NICAP, “3′ Bright Disc Maneuvers at High Speed”;

> **[UFO Report](https://www.nicap.org/470729canyonferry_dir.htm)**

Brad Sparks, Blue Books Unknowns Catalogue, Case 41, p. 25;

 ![07291947-CanyonFerryMT-Sparks-Case41-p25](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/6/69ad26099a686636af7db5c93000fdf6a2f89d6e.png)

[PURSUE release, pp. 137–138;]  
[https://www.war.gov/medialink/ufo/release\_1/38\_143685\_box7\_incident\_summaries\_1-100.pdf](https://www.war.gov/medialink/ufo/release_1/38_143685_box7_incident_summaries_1-100.pdf)’

 ![07291947-CanyonFerryMT-SIGN-Incident63-p1](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/e/e6169b4dc01c664daf2a9b23e17033fa52b4e1ac.jpeg)

 ![07291947-CanyonFerryMT-SIGN-Incident63-p2](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/f/ffe8abf9909a5a77d448d3ee7f7a208ce8f5c862.jpeg)

[PURSUE release, pp. 74–76, 173–175;]

 ![07291947-CanyonFerryMT-65_hs1-834228961_62-hq-83894_section_3-p74](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/e/e7d8bb8f25cee3597f7b358984a3df8ec1d7e7a0.jpeg)

 ![07291947-CanyonFerryMT-65_hs1-834228961_62-hq-83894_section_3-p75](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/d/df8c7be95ccc5c7fc1cc9c48227ae453287d2cdd.jpeg)

 ![07291947-CanyonFerryMT-65_hs1-834228961_62-hq-83894_section_3-p76](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/c/c8e7b38828890204910dad73b28c44f0302f564d.jpeg)

 ![07291947-CanyonFerryMT-65_hs1-834228961_62-hq-83894_section_3-p173](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/e/efc872f93824e5876b97a989fd5871cfb8729722.jpeg)

 ![07291947-CanyonFerryMT-65_hs1-834228961_62-hq-83894_section_3-p174](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/6/6cb8f08e97e98a239bf15bb786728e00317b1dc1.jpeg)

 ![07291947-CanyonFerryMT-65_hs1-834228961_62-hq-83894_section_3-p175](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/d/d2cb421484cd2b276d2ec16018dd6b90d025b7ee.jpeg)

[https://www.war.gov/medialink/ufo/release\_1/65\_hs1-834228961\_62-hq-83894\_section\_3.pdf](https://www.war.gov/medialink/ufo/release_1/65_hs1-834228961_62-hq-83894_section_3.pdf)

[PURSUE release, pp. 182–183];

 ![07291947-CanyonFerryMT-SIGN-Incident63-ALT-p1](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/0/0e470a1859bac21617294c9575fd0cb9c07f96ab.jpeg)

 ![07291947-CanyonFerryMT-SIGN-Incident63-ALT-p2](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/a/a04cbe0a84742476c5e3d16bd4cb7295d2558c25.jpeg)

[https://www.war.gov/medialink/ufo/061226/release\_03/documents/DOW-UAP-D087\_US-AirForce\_Analysis-of-Flying-Objects-in-the-US\_1-100.pdf](https://www.war.gov/medialink/ufo/061226/release_03/documents/DOW-UAP-D087_US-AirForce_Analysis-of-Flying-Objects-in-the-US_1-100.pdf)