![](https://image.tmdb.org/t/p/original/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![](https://image.tmdb.org/t/p/w342/dsOGBGdtQ1tcR3SktxHokQwjSO8.jpg)
The Iron Horse of Grand Mountain
Robert Humphrey begins running steam-train tours in Grand Mountain which Lassie and Zoe see are scaring the park's small herd of buffalo. Graham tells Humphrey he must change the train's route. Humphrey ignores the warnings and sends the train down an old and damaged track. Now, not only are the buffalo in real danger, but every passenger on the train is at risk... and only Zoe and Lassie can prevent a disaster.
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![](https://image.tmdb.org/t/p/w300/yUpoMqUazzi3zMpnbE6grZAsPnE.jpg)
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Other episodes for this season
![Saving Zuli!](https://image.tmdb.org/t/p/w300/1Co7TFA4yE5LhMFAQ6cMrkLFweD.jpg)
![Poachers in the Park!](https://image.tmdb.org/t/p/w300/aS1IXUihjniAIxixJRvv0ONLJDG.jpg)
![Gold Rush!](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Danger on the Mountain](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Treasure of Dan Montaigne](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Forest Fire!](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Spider Bite!](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Roundup!](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Wolf Attack](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Avalanche](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Day Off](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Tornado Hunters](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Where's Lassie?](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Who Knows Best?](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Hide and Seek!](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Frances' Garden](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Iron Horse of Grand Mountain](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Demon of Diamond Lake](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Thin Ice](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Trapped](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Momma Zoe](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Condors in the Valley](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Harvey's Journey](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Secrets of the Parker Clan](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Grand Mountain Adventure Challenge - Part 1](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Grand Mountain Adventure Challenge - Part 2](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)