Molly Grabill is preparing for the California International Marathon - taking place in 15 days time - with a 10km tempo in Boulder, Colorado.

Molly won the Indianapolis Half Marathon 2 weeks ago in a personal best time of 70:40 and hopes to lower the Marathon personal best of 2:35 at CIM.

Joining Molly for the workout is Sri Lankan national record holder for the Marathon - Hiruni Wijayaratne.

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Sweat Elite Instagram:   / sweatelite  

Molly Grabill Instagram:   / mollyjgrabill  

Hiruni Wijayaratne Instagram:   / hiruni_w  

Filmed by Nate Castner - Instagram:   / mtn_techne  

Edited by Matt Fox - Instagram:   / mattinglisfox  

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