Enter a recent race time to see the paces you can train at today.
Two hours in the half marathon has become the recreational runner's most widely aspired-to milestone — meaningful, achievable with structured training, and more demanding than most first-timers expect. The training paces here represent what a genuine sub-2 runner trains at across all five zones.
Quick answer: To break Sub-2:00:00 in the Half Marathon (RPI 36.5), your training paces are: easy 10:22/mi, threshold 8:44/mi, interval 8:00/mi. Equivalent fitness: Marathon 4:07:29, 10K 54:04.
RPI 36.5 · Goal: 1:59:59 · All paces in min/mile
Calculated from StrideIQ's RPI equations. Easy pace means "this pace or slower."
These are the predicted equivalent times at other distances for a runner with RPI 36.5 — assuming comparable training for each distance.
Marathon
4:07:29
9:26/mi
10K
54:04
8:42/mi
5K
26:03
8:23/mi
For sub-2 hour half marathon, threshold running is the most race-specific training. The half marathon is essentially a long, sustained threshold effort — 75 to 110 minutes near your lactate threshold. Tempo runs at threshold pace build the metabolic capacity to sustain that effort. Long runs at easy pace build the endurance infrastructure that makes late-race pacing possible. Marathon-pace segments in long runs bridge the gap between easy endurance and race-day pace.
To train for a sub-2:00:00 half marathon (1:59:59), your training zones are: Easy 10:22/mi, Marathon 9:26/mi, Threshold 8:44/mi, Interval 8:00/mi, Repetition 7:36/mi. Your race pace (approximately 9:10/mi) falls between your marathon and threshold pace — which is exactly where half marathon effort sits physiologically.
Essential — but pace matters as much as distance. Long runs for half marathon training should be at easy pace (genuinely conversational). The aerobic adaptation comes from time on feet, not from pushing pace. Runners who hammer every long run accumulate fatigue and underperform at quality sessions during the week. A typical sub-2 half training block includes weekly long runs building to 14–18 miles over several months, all at easy pace, with marathon-pace miles added at the finish as fitness develops.
Sub-2 hour half marathon fitness (RPI 36.5) projects to approximately 4:07:29 for the full marathon — assuming full marathon-specific preparation (20-mile long runs, marathon-pace work, adequate weekly volume). Without marathon-specific training, most runners hit the wall well before this equivalent time. Aerobic fitness is necessary but not sufficient for marathon performance.
Paces calculated using StrideIQ's RPI equations. All values derived from the same formula used by the StrideIQ training pace calculator. Goal times use the target-minus-one-second convention (e.g., sub-20 = 19:59 input).