Foreground: Marit Bjorgen (Norway) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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Foreground: Marit Bjorgen (Norway) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Victoria Karl (Germany), Alisa Zhambalova (Russia), Kornelia Kubinska (Poland) and Nicole Fessel (Germany) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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An athlete during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Nicole Fessel (Germany), Alisa Zhambalova (Russia), Kornelia Kubinska (Poland) and Elena Sobleva (Russia) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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Athletes during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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Athletes during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From right: Elena Sobleva (Russia) and Kornelia Kubinska (Poland) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Chelsey Holmes (United States) and Yulia Chekaleva (Russia) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Kornelia Kubinska (Poland) and Elena Sobleva (Russia) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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Elena Sobleva (Russia) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Yulia Chekaleva (Russia), Chelsey Holmes (USA) and Ebba Andersson (Sweden) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Krista Parmakoski (Finland), Jessica Diggins (USA), Marit Bjorgen (Norway) and Heidi Weng (Norway) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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Foreground: Marit Bjorgen (Norway) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Elena Sobleva (Russia) and Katerina Beruseova (Czech Republic) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From right: Anna Medvedeva (Russia), Kornelia Kubinska (Poland), Alisa Zhambalova (Russia) and Petra Novakova (Czech Republic) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From right: Marit Bjorgen (Norway), Krista Parmakoski (Finland) and Heidi Weng (Norway) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Nicole Fessel (Germany) and Elena Sobleva (Russia) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Charlotte Kalla (Sweden) and Yulia Tikhonova (Belarus) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Heidi Weng (Norway), Marit Bjorgen (Norway), Jessica Diggins (USA) and Krista Parmakoski (Finland) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Krista Parmakoski (Finland) and Marit Bjorgen (Norway) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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From left: Alisa Zhambalova (Russia) and Elena Soboleva (Russia) during the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland.

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Center: Marit Bjorgen (Norway) who won the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland. Left: Astrid Jacobsen (Norway), who came third; right: Heidi Weng (Norway), who came second.

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Center: Marit Bjorgen (Norway) who won the women's mass start race at Lahti2017 FIS Nordic World Ski Championships in Lahti, Finland. Left: Astrid Jacobsen (Norway), who came third; right: Heidi Weng (Norway), who came second.

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