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Training for your first marathon? Here’s how to go from half to full in 12 weeks – just in time for Kielder
Altra Kielder Marathon 2025 is on the horizon – and if you’ve ticked off a half marathon or two and are thinking about the next big challenge, this is your sign. Because yes, you can go from half to full in 12 weeks – and there’s no better place to do it than Kielder. Twelve