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BOSTON MARATHON 2023

Jennifer Sunahara

Bib: 9758•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 40%
Gender (Female)
#0 / 11423
Top 21%
Division (F18-39)
#0 / 4884
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:12
Rank: #9374
Start → 5K
23:12 | 7:28/mi
10K· 6.21 mi
46:57
Rank: #10529 (-1155)
5K → 10K
23:45 | 7:39/mi
15K· 9.32 mi
1:10:59
Rank: #11071 (-542)
10K → 15K
24:02 | 7:44/mi
20K· 12.43 mi
1:35:17
Rank: #11247 (-176)
15K → 20K
24:18 | 7:49/mi
Half· 13.11 mi
1:40:31
Rank: #11253 (-6)
20K → Half
5:14 | 7:40/mi
25K· 15.53 mi
1:59:35
Rank: #11283 (-30)
Half → 25K
19:04 | 7:52/mi
30K· 18.64 mi
2:24:19
Rank: #11100 (+183)
25K → 30K
24:44 | 7:58/mi
20M
2:35:12
Rank: #11020 (+80)
30K → 20M
10:53 | 8:01/mi
21M
2:43:51
Rank: #11022 (-2)
20M → 21M
8:39 | 8:39/mi
35K· 21.75 mi
2:49:36
Rank: #10959 (+63)
21M → 35K
5:45 | 7:41/mi
23M
2:59:46
Rank: #10918 (+41)
35K → 23M
10:10 | 8:07/mi
24M
3:07:24
Rank: #10808 (+110)
23M → 24M
7:38 | 7:38/mi
40K· 24.85 mi
3:14:06
Rank: #10705 (+103)
24M → 40K
6:42 | 7:50/mi
25.2M
3:16:59
Rank: #10662 (+43)
40K → 25.2M
2:53 | 8:22/mi
Finish· 26.22 mi
3:24:33
Rank: #10528 (+134)
25.2M → Finish
7:34 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:31
Pace7:40 /mi
2nd Half
Distance13.11 mi
Time1:44:02
Pace7:56 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:0423:127:2823:12
7:28
-
10K
6.21 mi11:12:4946:577:3323:45
7:39
+0:11
15K
9.32 mi11:36:511:10:597:3724:02
7:44
+0:05
20K
12.43 mi12:01:091:35:177:4024:18
7:49
+0:05
Half
13.11 mi12:06:231:40:317:405:14
7:40
-0:09
25K
15.53 mi12:25:271:59:357:4219:04
7:52
+0:12
30K
18.64 mi12:50:112:24:197:4524:44
7:58
+0:06
20M
20.00 mi13:01:042:35:127:4610:53
8:01
+0:03
21M
21.00 mi13:09:432:43:517:488:39
8:39
+0:38
35K
21.75 mi13:15:282:49:367:485:45
7:41
-0:58
23M
23.00 mi13:25:382:59:467:4910:10
8:07
+0:26
24M
24.00 mi13:33:163:07:247:497:38
7:38
-0:29
40K
24.85 mi13:39:583:14:067:496:42
7:50
+0:12
25.2M
25.20 mi13:42:513:16:597:492:53
8:22
+0:32
Finish
26.22 mi13:50:253:24:337:487:34
7:26
-0:56

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

7:26 /mi

Average Pace

7:48 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:13:01

94% of race

Time at Steady Pace

11:32

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:48 /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 mi10:49:0423:127:2823:12
7:28
#9374
10K
6.21 mi11:12:4946:577:3323:45
7:39
#10529
15K
9.32 mi11:36:511:10:597:3724:02
7:44
#11071
20K
12.43 mi12:01:091:35:177:4024:18
7:49
#11247
Half
13.11 mi12:06:231:40:317:405:14
7:40
#11253
25K
15.53 mi12:25:271:59:357:4219:04
7:52
#11283
30K
18.64 mi12:50:112:24:197:4524:44
7:58
#11100
20M
20.00 mi13:01:042:35:127:4610:53
8:01
#11020
21M
21.00 mi13:09:432:43:517:488:39
8:39
#11022
35K
21.75 mi13:15:282:49:367:485:45
7:41
#10959
23M
23.00 mi13:25:382:59:467:4910:10
8:07
#10918
24M
24.00 mi13:33:163:07:247:497:38
7:38
#10808
40K
24.85 mi13:39:583:14:067:496:42
7:50
#10705
25.2M
25.20 mi13:42:513:16:597:492:53
8:22
#10662
Finish
26.22 mi13:50:253:24:337:487:34
7:26
#10528
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi93741569156912167(Top 46%)2989(Top 26%)2989(Top 61%)
10K6.21 mi3.10 mi10529-11552087-5182087-51811750(Top 44%)2726(Top 24%)2726(Top 56%)
15K9.32 mi3.11 mi11071-5422371-2842371-28412167(Top 46%)2989(Top 26%)2989(Top 61%)
20K12.43 mi3.11 mi11247-1762469-982469-9811927(Top 45%)2924(Top 26%)2924(Top 60%)
Half13.11 mi0.68 mi11253-62472-32472-311652(Top 44%)2696(Top 24%)2696(Top 55%)
25K15.53 mi2.42 mi11283-302522-502522-5011645(Top 44%)2854(Top 25%)2854(Top 58%)
30K18.64 mi3.11 mi11100+1832459+632459+6310590(Top 40%)2442(Top 21%)2442(Top 50%)
20M20.00 mi1.36 mi11020+802445+142445+1410350(Top 39%)2396(Top 21%)2396(Top 49%)
21M21.00 mi1.00 mi11022-22473-282473-2811360(Top 43%)3058(Top 27%)3058(Top 63%)
35K21.75 mi0.75 mi10959+632456+172456+179875(Top 37%)2300(Top 20%)2300(Top 47%)
23M23.00 mi1.25 mi10918+412459-32459-310622(Top 40%)2825(Top 25%)2825(Top 58%)
24M24.00 mi1.00 mi10808+1102427+322427+328671(Top 33%)1958(Top 17%)1958(Top 40%)
40K24.85 mi0.85 mi10705+1032403+242403+248936(Top 34%)2152(Top 19%)2152(Top 44%)
25.2M25.20 mi0.35 mi10662+432396+72396+78736(Top 33%)2139(Top 19%)2139(Top 44%)
Finish26.22 mi1.02 mi10528+1342363+332363+338002(Top 30%)1832(Top 16%)1832(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21stories
+97ft-345ft

Overall

12167

Females

2989

F18-39

2989

5K→10K

3.1 - 6.2 mi

Top 44%
×5stories
+79ft-138ft

Overall

11750

Females

2726

F18-39

2726

10K→15K

6.2 - 9.3 mi

Top 46%
×3stories
+67ft-78ft

Overall

12167

Females

2989

F18-39

2989

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

11927

Females

2924

F18-39

2924

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

11652

Females

2696

F18-39

2696

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

11645

Females

2854

F18-39

2854

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

10590

Females

2442

F18-39

2442

30K→20M

18.6 - 20.0 mi

Top 39%
×5stories
+64ft-50ft

Overall

10350

Females

2396

F18-39

2396

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

11360

Females

3058

F18-39

3058

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

9875

Females

2300

F18-39

2300

35K→23M

21.8 - 23.0 mi

Top 40%
×5stories
+23ft-63ft

Overall

10622

Females

2825

F18-39

2825

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8671

Females

1958

F18-39

1958

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8936

Females

2152

F18-39

2152

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8736

Females

2139

F18-39

2139

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8002

Females

1832

F18-39

1832

Passing Analysis

Category:
Athletes Passed
1449*
Passed By
2602
Net Change
-1154
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9374
5K → 10K351189-1155#9374#10529
10K → 15K55597-542#10529#11071
15K → 20K109285-176#11071#11247
20K → Half2228-6#11247#11253
Half → 25K110140-30#11253#11283
25K → 30K27289+183#11283#11100
30K → 20M129*49+80#11100#11020
20M → 21M7779-2#11020#11022
21M → 35K7815+63#11022#10959
35K → 23M10564+41#10959#10918
23M → 24M13020+110#10918#10808
24M → 40K12219+103#10808#10705
40K → 25.2M5310+43#10705#10662
25.2M → Finish15218+134#10662#10528
TOTALS1449*2602-1154

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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