Joey Cupido added a hat trick for the Mammoth (6-5). Adam Jones and Drew Westervelt had a pair of goals each with John Grant, Alex Turner and Jackson Decker rounding out the attack.
Rhys Duch countered with a hat trick for Vancouver (4-6). Tyler Digby struck twice with Chris O'Dougherty, Tyler Hass, Justin Salt, Corey Small, Brandon Clelland and Johnny Powless supplying the rest of the offence.
Dillon Ward got the win in net for Colorado, stopping 39 shots. Tyler Richards suffered the loss after making 42 saves.
The Mammoth went 2 for 4 on the power play, with the Stealth scoring once on three chances.