The Courageous Highlander by Lily Baldwin

To ensure their clan prospers, each year, on the twelfth day of Yule, the chieftain of Clan MacArthur must strike out alone and shoot a stag on the summit of a treacherous mountain. Armed with a bow and his courageous heart, Laird Owen MacArthur carries on this tradition. He expects to face howling winds, snow, and ice. What he doesn’t expect is to find a young woman nigh frozen to death on the very mountaintop few men have ever climbed.
Within Owen’s protective embrace, Gwynn will find refuge from the harsh weather, but the cold is not the only threat to her life. She escaped the clutches of her fierce master who will stop at nothing to find her, but even he might not be her worst enemy.