Cardiowise probably yeah but there's other factors like blisters and dehydration at that distance. I'm running one in a week. I've been running on an indoor track during the summer and shifted in the last week back to outdoors despite the heat and humidity still being stupid high here until Michael came through. Huge difference in an indoor "rubberized" track and pavement in terms of blister generation when using toe-shoes. Trying to quick-form the necessary calluses right now. I also simply don't drink enough water. Been trying to rectify that but it's a daily struggle. I have no concerns about finishing the half, and I'm sure I'll be *around* two hours, but making it under is the goal. I already know I can consistently run half of a half (10k) at an 8 minute pace, so it's simply a matter of extending that with minimal time loss.