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BOSTON MARATHON 2025

Kristin O'Day

Bib: 27542•F

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:39/mi
29:59
↑ 97↓ 3451.5%
10K· 6.21 mi
9:47/mi
1:00:24
↑ 79↓ 1380.4%
15K· 9.32 mi
9:50/mi
1:30:57
↑ 67↓ 78
20K· 12.43 mi
9:52/mi
2:01:36
↑ 106↓ 860.1%
Half· 13.11 mi
9:48/mi
2:08:17
↑ 19↓ 370.5%
25K· 15.53 mi
10:15/mi
2:33:09
↑ 66↓ 880.2%
30K· 18.64 mi
11:04/mi
3:07:31
↑ 181↓ 1480.2%
20M
10:54/mi
3:22:20
↑ 64↓ 500.2%
21M
13:27/mi
3:35:47
↑ 106↓ 241.6%
35K· 21.75 mi
10:52/mi
3:43:55
↑ 17↓ 861.7%
23M
11:14/mi
3:57:59
↑ 23↓ 630.6%
24M
11:02/mi
4:09:01
↓ 821.3%
40K· 24.85 mi
11:09/mi
4:18:33
↓ 200.3%
25.2M
11:53/mi
4:22:39
↑ 13↓ 160.2%
Finish· 26.22 mi
9:47/mi
4:32:37
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:17
Pace9:47 /mi
2nd Half
Distance13.11 mi
Time2:24:20
Pace11:01 /mi
📊Positive Split: 12.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1629:599:3929:59
9:39
-
10K
6.21 mi12:16:411:00:249:4330:25
9:47
+0:08
15K
9.32 mi12:47:141:30:579:4530:33
9:50
+0:03
20K
12.43 mi13:17:532:01:369:4730:39
9:52
+0:02
Half
13.11 mi13:24:342:08:179:476:41
9:48
-0:04
25K
15.53 mi13:49:262:33:099:5224:52
10:15
+0:27
30K
18.64 mi14:23:483:07:3110:0434:22
11:04
+0:49
20M
20.00 mi14:38:373:22:2010:0714:49
10:54
-0:10
21M
21.00 mi14:52:043:35:4710:1713:27
13:27
+2:33
35K
21.75 mi15:00:123:43:5510:188:08
10:52
-2:35
23M
23.00 mi15:14:163:57:5910:2114:04
11:14
+0:22
24M
24.00 mi15:25:184:09:0110:2311:02
11:02
-0:12
40K
24.85 mi15:34:504:18:3310:249:32
11:09
+0:07
25.2M
25.20 mi15:38:564:22:3910:254:06
11:53
+0:44
Finish
26.22 mi15:48:544:32:3710:249:58
9:47
-2:06

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:39 /mi

Average Pace

10:24 /mi

Slowest Pace

13:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:43:07

60% of race

Time at Steady Pace

1:31:57

34% of race

Time at Slower Pace

17:33

6% of race

Average Pace: 10:24 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:46:1629:599:3929:59
9:39
#24702
10K
6.21 mi12:16:411:00:249:4330:25
9:47
#24786
15K
9.32 mi12:47:141:30:579:4530:33
9:50
#24728
20K
12.43 mi13:17:532:01:369:4730:39
9:52
#24505
Half
13.11 mi13:24:342:08:179:476:41
9:48
#24494
25K
15.53 mi13:49:262:33:099:5224:52
10:15
#24393
30K
18.64 mi14:23:483:07:3110:0434:22
11:04
#24367
20M
20.00 mi14:38:373:22:2010:0714:49
10:54
#24296
21M
21.00 mi14:52:043:35:4710:1713:27
13:27
#24406
35K
21.75 mi15:00:123:43:5510:188:08
10:52
#24398
23M
23.00 mi15:14:163:57:5910:2114:04
11:14
#24366
24M
24.00 mi15:25:184:09:0110:2311:02
11:02
#24346
40K
24.85 mi15:34:504:18:3310:249:32
11:09
#24325
25.2M
25.20 mi15:38:564:22:3910:254:06
11:53
#24301
Finish
26.22 mi15:48:544:32:3710:249:58
9:47
#24240
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi24702100601006024625(Top 87%)10019(Top 82%)10019(Top 553%)
10K6.21 mi3.10 mi24786-8410111-5110111-5124835(Top 87%)10147(Top 83%)10147(Top 560%)
15K9.32 mi3.11 mi24728+5810074+3710074+3724625(Top 87%)10019(Top 82%)10019(Top 553%)
20K12.43 mi3.11 mi24505+2239979+959979+9523935(Top 84%)9670(Top 79%)9670(Top 533%)
Half13.11 mi0.68 mi24494+119975+49975+424391(Top 86%)9935(Top 81%)9935(Top 548%)
25K15.53 mi2.42 mi24393+1019927+489927+4823855(Top 84%)9667(Top 79%)9667(Top 533%)
30K18.64 mi3.11 mi24367+269930-39930-324109(Top 85%)9925(Top 81%)9925(Top 547%)
20M20.00 mi1.36 mi24296+719911+199911+1923413(Top 82%)9636(Top 79%)9636(Top 531%)
21M21.00 mi1.00 mi24406-1109985-749985-7425622(Top 90%)10866(Top 89%)10866(Top 599%)
35K21.75 mi0.75 mi24398+89990-59990-523960(Top 84%)10034(Top 82%)10034(Top 553%)
23M23.00 mi1.25 mi24366+329984+69984+623752(Top 84%)9987(Top 82%)9987(Top 551%)
24M24.00 mi1.00 mi24346+209987-39987-324070(Top 85%)10154(Top 83%)10154(Top 560%)
40K24.85 mi0.85 mi24325+219982+59982+523471(Top 83%)9931(Top 81%)9931(Top 548%)
25.2M25.20 mi0.35 mi24301+249979+39979+323036(Top 81%)9679(Top 79%)9679(Top 534%)
Finish26.22 mi1.02 mi24240+619964+159964+1522234(Top 78%)9289(Top 76%)9289(Top 512%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

24625

Females

10019

F45-49

10019

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

24835

Females

10147

F45-49

10147

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

24625

Females

10019

F45-49

10019

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

23935

Females

9670

F45-49

9670

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

24391

Females

9935

F45-49

9935

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

23855

Females

9667

F45-49

9667

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

24109

Females

9925

F45-49

9925

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23413

Females

9636

F45-49

9636

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

25622

Females

10866

F45-49

10866

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

23960

Females

10034

F45-49

10034

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

23752

Females

9987

F45-49

9987

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

24070

Females

10154

F45-49

10154

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

23471

Females

9931

F45-49

9931

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

23036

Females

9679

F45-49

9679

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

22234

Females

9289

F45-49

9289

Passing Analysis

Category:
Athletes Passed
1380
Passed By
918
Net Change
+462
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24702
5K → 10K170254-84#24702#24786
10K → 15K159101+58#24786#24728
15K → 20K26239+223#24728#24505
20K → Half2716+11#24505#24494
Half → 25K16362+101#24494#24393
25K → 30K150124+26#24393#24367
30K → 20M9827+71#24367#24296
20M → 21M31141-110#24296#24406
21M → 35K3931+8#24406#24398
35K → 23M7341+32#24398#24366
23M → 24M5939+20#24366#24346
24M → 40K4625+21#24346#24325
40K → 25.2M295+24#24325#24301
25.2M → Finish7413+61#24301#24240
TOTALS1380918+462
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing