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BOSTON MARATHON 2023

Kristine Koo

Bib: 20259•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 36%
Masters (Masters Women)
#0 / 6539
Top 23%
Division (F40-44)
#0 / 1878
Top 42%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:59
Rank: #16599
Start → 5K
25:59 | 8:22/mi
10K· 6.21 mi
51:01
Rank: #15892 (+707)
5K → 10K
25:02 | 8:03/mi
15K· 9.32 mi
1:16:04
Rank: #15558 (+334)
10K → 15K
25:03 | 8:04/mi
20K· 12.43 mi
1:41:00
Rank: #15074 (+484)
15K → 20K
24:56 | 8:02/mi
Half· 13.11 mi
1:46:26
Rank: #15008 (+66)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:05:35
Rank: #14539 (+469)
Half → 25K
19:09 | 7:54/mi
30K· 18.64 mi
2:31:05
Rank: #14143 (+396)
25K → 30K
25:30 | 8:12/mi
20M
2:42:31
Rank: #14049 (+94)
30K → 20M
11:26 | 8:25/mi
21M
2:51:23
Rank: #13924 (+125)
20M → 21M
8:52 | 8:52/mi
35K· 21.75 mi
2:57:31
Rank: #13903 (+21)
21M → 35K
6:08 | 8:12/mi
23M
3:08:03
Rank: #13780 (+123)
35K → 23M
10:32 | 8:25/mi
24M
3:16:18
Rank: #13734 (+46)
23M → 24M
8:15 | 8:15/mi
40K· 24.85 mi
3:23:33
Rank: #13685 (+49)
24M → 40K
7:15 | 8:29/mi
25.2M
3:26:44
Rank: #13684 (+1)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:35:28
Rank: #13761 (-77)
25.2M → Finish
8:44 | 8:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:26
Pace8:07 /mi
2nd Half
Distance13.11 mi
Time1:49:02
Pace8:19 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5625:598:2225:59
8:22
-
10K
6.21 mi11:42:5851:018:1325:02
8:03
-0:19
15K
9.32 mi12:08:011:16:048:1025:03
8:04
+0:01
20K
12.43 mi12:32:571:41:008:0824:56
8:02
-0:02
Half
13.11 mi12:38:231:46:268:075:26
7:58
-0:04
25K
15.53 mi12:57:322:05:358:0519:09
7:54
-0:04
30K
18.64 mi13:23:022:31:058:0625:30
8:12
+0:18
20M
20.00 mi13:34:282:42:318:0811:26
8:25
+0:13
21M
21.00 mi13:43:202:51:238:108:52
8:52
+0:27
35K
21.75 mi13:49:282:57:318:106:08
8:12
-0:40
23M
23.00 mi14:00:003:08:038:1110:32
8:25
+0:13
24M
24.00 mi14:08:153:16:188:118:15
8:15
-0:10
40K
24.85 mi14:15:303:23:338:117:15
8:29
+0:14
25.2M
25.20 mi14:18:413:26:448:123:11
9:14
+0:45
Finish
26.22 mi14:27:253:35:288:138:44
8:34
-0:40

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

7:54 /mi

Average Pace

8:13 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:23:25

94% of race

Time at Steady Pace

12:03

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:13 /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 mi11:17:5625:598:2225:59
8:22
#16599
10K
6.21 mi11:42:5851:018:1325:02
8:03
#15892
15K
9.32 mi12:08:011:16:048:1025:03
8:04
#15558
20K
12.43 mi12:32:571:41:008:0824:56
8:02
#15074
Half
13.11 mi12:38:231:46:268:075:26
7:58
#15008
25K
15.53 mi12:57:322:05:358:0519:09
7:54
#14539
30K
18.64 mi13:23:022:31:058:0625:30
8:12
#14143
20M
20.00 mi13:34:282:42:318:0811:26
8:25
#14049
21M
21.00 mi13:43:202:51:238:108:52
8:52
#13924
35K
21.75 mi13:49:282:57:318:106:08
8:12
#13903
23M
23.00 mi14:00:003:08:038:1110:32
8:25
#13780
24M
24.00 mi14:08:153:16:188:118:15
8:15
#13734
40K
24.85 mi14:15:303:23:338:117:15
8:29
#13685
25.2M
25.20 mi14:18:413:26:448:123:11
9:14
#13684
Finish
26.22 mi14:27:253:35:288:138:44
8:34
#13761
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi165995664566414915(Top 56%)4628(Top 41%)4628(Top 246%)
10K6.21 mi3.10 mi15892+7075216+4485216+44815221(Top 57%)4808(Top 42%)4808(Top 256%)
15K9.32 mi3.11 mi15558+3345014+2025014+20214915(Top 56%)4628(Top 41%)4628(Top 246%)
20K12.43 mi3.11 mi15074+4844728+2864728+28613668(Top 51%)3918(Top 34%)3918(Top 209%)
Half13.11 mi0.68 mi15008+664686+424686+4214126(Top 53%)4157(Top 36%)4157(Top 221%)
25K15.53 mi2.42 mi14539+4694425+2614425+26111930(Top 45%)3043(Top 27%)3043(Top 162%)
30K18.64 mi3.11 mi14143+3964229+1964229+19612405(Top 47%)3417(Top 30%)3417(Top 182%)
20M20.00 mi1.36 mi14049+944196+334196+3313115(Top 49%)3922(Top 34%)3922(Top 209%)
21M21.00 mi1.00 mi13924+1254130+664130+6612688(Top 48%)3784(Top 33%)3784(Top 201%)
35K21.75 mi0.75 mi13903+214138-84138-813448(Top 51%)4247(Top 37%)4247(Top 226%)
23M23.00 mi1.25 mi13780+1234088+504088+5012689(Top 48%)3902(Top 34%)3902(Top 208%)
24M24.00 mi1.00 mi13734+464089-14089-112963(Top 49%)4115(Top 36%)4115(Top 219%)
40K24.85 mi0.85 mi13685+494076+134076+1313230(Top 50%)4328(Top 38%)4328(Top 230%)
25.2M25.20 mi0.35 mi13684+14080-44080-413844(Top 52%)4655(Top 41%)4655(Top 248%)
Finish26.22 mi1.02 mi13761-774147-674147-6715828(Top 59%)5707(Top 50%)5707(Top 304%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21stories
+97ft-345ft

Overall

14915

Females

4628

F40-44

4628

5K→10K

3.1 - 6.2 mi

Top 57%
×5stories
+79ft-138ft

Overall

15221

Females

4808

F40-44

4808

10K→15K

6.2 - 9.3 mi

Top 56%
×3stories
+67ft-78ft

Overall

14915

Females

4628

F40-44

4628

15K→20K

9.3 - 12.4 mi

Top 51%
×5stories
+106ft-86ft

Overall

13668

Females

3918

F40-44

3918

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14126

Females

4157

F40-44

4157

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

11930

Females

3043

F40-44

3043

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

12405

Females

3417

F40-44

3417

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13115

Females

3922

F40-44

3922

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

12688

Females

3784

F40-44

3784

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

13448

Females

4247

F40-44

4247

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

12689

Females

3902

F40-44

3902

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

12963

Females

4115

F40-44

4115

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13230

Females

4328

F40-44

4328

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13844

Females

4655

F40-44

4655

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

15828

Females

5707

F40-44

5707

Passing Analysis

Category:
Athletes Passed
3436
Passed By
598
Net Change
+2838
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16599
5K → 10K80699+707#16599#15892
10K → 15K39561+334#15892#15558
15K → 20K50824+484#15558#15074
20K → Half759+66#15074#15008
Half → 25K4712+469#15008#14539
25K → 30K42529+396#14539#14143
30K → 20M13844+94#14143#14049
20M → 21M16136+125#14049#13924
21M → 35K5332+21#13924#13903
35K → 23M14724+123#13903#13780
23M → 24M9044+46#13780#13734
24M → 40K8132+49#13734#13685
40K → 25.2M4241+1#13685#13684
25.2M → Finish44121-77#13684#13761
TOTALS3436598+2838
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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