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BOSTON MARATHON 2023

Jennifer Splinter

Bib: 10748•F

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Female)
#0 / 11423
Top 21%
Masters (Masters Women)
#0 / 6539
Top 10%
Division (F40-44)
#0 / 1878
Top 20%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:14/mi
22:27
↑ 97↓ 3451.5%
10K· 6.21 mi
7:08/mi
44:36
↑ 79↓ 1380.4%
15K· 9.32 mi
7:18/mi
1:07:16
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:30:58
↑ 106↓ 860.1%
Half· 13.11 mi
7:40/mi
1:36:12
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
1:54:52
↑ 66↓ 880.2%
30K· 18.64 mi
8:20/mi
2:20:46
↑ 181↓ 1480.2%
20M
8:26/mi
2:32:14
↑ 64↓ 500.2%
21M
9:22/mi
2:41:36
↑ 106↓ 241.6%
35K· 21.75 mi
8:48/mi
2:48:11
↑ 17↓ 861.7%
23M
8:42/mi
2:59:05
↑ 23↓ 630.6%
24M
7:46/mi
3:06:51
↓ 821.3%
40K· 24.85 mi
8:23/mi
3:14:01
↓ 200.3%
25.2M
9:11/mi
3:17:11
↑ 13↓ 160.2%
Finish· 26.22 mi
7:45/mi
3:25:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:12
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:48:53
Pace8:18 /mi
📊Positive Split: 13.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:0022:277:1422:27
7:14
-
10K
6.21 mi11:11:0944:367:1122:09
7:08
-0:06
15K
9.32 mi11:33:491:07:167:1322:40
7:18
+0:10
20K
12.43 mi11:57:311:30:587:1923:42
7:38
+0:20
Half
13.11 mi12:02:451:36:127:205:14
7:40
+0:02
25K
15.53 mi12:21:251:54:527:2418:40
7:42
+0:02
30K
18.64 mi12:47:192:20:467:3325:54
8:20
+0:38
20M
20.00 mi12:58:472:32:147:3711:28
8:26
+0:06
21M
21.00 mi13:08:092:41:367:429:22
9:22
+0:56
35K
21.75 mi13:14:442:48:117:446:35
8:48
-0:34
23M
23.00 mi13:25:382:59:057:4710:54
8:42
-0:06
24M
24.00 mi13:33:243:06:517:477:46
7:46
-0:56
40K
24.85 mi13:40:343:14:017:487:10
8:23
+0:37
25.2M
25.20 mi13:43:443:17:117:493:10
9:11
+0:48
Finish
26.22 mi13:51:383:25:057:507:54
7:45
-1:26

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

7:08 /mi

Average Pace

7:50 /mi

Slowest Pace

9:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:07:16

33% of race

Time at Steady Pace

1:03:16

31% of race

Time at Slower Pace

1:14:33

36% of race

Average Pace: 7:49 /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 mi10:49:0022:277:1422:27
7:14
#7673
10K
6.21 mi11:11:0944:367:1122:09
7:08
#7622
15K
9.32 mi11:33:491:07:167:1322:40
7:18
#7881
20K
12.43 mi11:57:311:30:587:1923:42
7:38
#8397
Half
13.11 mi12:02:451:36:127:205:14
7:40
#8564
25K
15.53 mi12:21:251:54:527:2418:40
7:42
#8803
30K
18.64 mi12:47:192:20:467:3325:54
8:20
#9602
20M
20.00 mi12:58:472:32:147:3711:28
8:26
#9831
21M
21.00 mi13:08:092:41:367:429:22
9:22
#10180
35K
21.75 mi13:14:442:48:117:446:35
8:48
#10453
23M
23.00 mi13:25:382:59:057:4710:54
8:42
#10686
24M
24.00 mi13:33:243:06:517:477:46
7:46
#10631
40K
24.85 mi13:40:343:14:017:487:10
8:23
#10677
25.2M
25.20 mi13:43:443:17:117:493:10
9:11
#10723
Finish
26.22 mi13:51:383:25:057:507:54
7:45
#10679
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi76739049048533(Top 32%)1264(Top 11%)1264(Top 67%)
10K6.21 mi3.10 mi7622+51891+13891+137637(Top 29%)938(Top 8%)938(Top 50%)
15K9.32 mi3.11 mi7881-259995-104995-1048533(Top 32%)1264(Top 11%)1264(Top 67%)
20K12.43 mi3.11 mi8397-5161197-2021197-20210319(Top 39%)2061(Top 18%)2061(Top 110%)
Half13.11 mi0.68 mi8564-1671262-651262-6511655(Top 44%)2699(Top 24%)2699(Top 144%)
25K15.53 mi2.42 mi8803-2391375-1131375-11310303(Top 39%)2137(Top 19%)2137(Top 114%)
30K18.64 mi3.11 mi9602-7991718-3431718-34313273(Top 50%)3899(Top 34%)3899(Top 208%)
20M20.00 mi1.36 mi9831-2291842-1241842-12413251(Top 50%)3983(Top 35%)3983(Top 212%)
21M21.00 mi1.00 mi10180-3492033-1912033-19115332(Top 58%)5240(Top 46%)5240(Top 279%)
35K21.75 mi0.75 mi10453-2732193-1602193-16016938(Top 64%)6232(Top 55%)6232(Top 332%)
23M23.00 mi1.25 mi10686-2332349-1562349-15614415(Top 54%)4852(Top 42%)4852(Top 258%)
24M24.00 mi1.00 mi10631+552342+72342+79559(Top 36%)2369(Top 21%)2369(Top 126%)
40K24.85 mi0.85 mi10677-462389-472389-4712589(Top 47%)3981(Top 35%)3981(Top 212%)
25.2M25.20 mi0.35 mi10723-462424-352424-3513564(Top 51%)4501(Top 39%)4501(Top 240%)
Finish26.22 mi1.02 mi10679+442431-72431-710340(Top 39%)2857(Top 25%)2857(Top 152%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

8533

Females

1264

F40-44

1264

5K→10K

3.1 - 6.2 mi

Top 29%
×5story building
+79ft-138ft

Overall

7637

Females

938

F40-44

938

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

8533

Females

1264

F40-44

1264

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10319

Females

2061

F40-44

2061

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

11655

Females

2699

F40-44

2699

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10303

Females

2137

F40-44

2137

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

13273

Females

3899

F40-44

3899

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

13251

Females

3983

F40-44

3983

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

15332

Females

5240

F40-44

5240

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

16938

Females

6232

F40-44

6232

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14415

Females

4852

F40-44

4852

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

9559

Females

2369

F40-44

2369

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

12589

Females

3981

F40-44

3981

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13564

Females

4501

F40-44

4501

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

10340

Females

2857

F40-44

2857

Passing Analysis

Category:
Athletes Passed
782
Passed By
3786
Net Change
-3006
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7673
5K → 10K249198+51#7673#7622
10K → 15K55314-259#7622#7881
15K → 20K35551-516#7881#8397
20K → Half1168-167#8397#8564
Half → 25K42281-239#8564#8803
25K → 30K32831-799#8803#9602
30K → 20M39268-229#9602#9831
20M → 21M24371-349#9831#10180
21M → 35K13286-273#10180#10453
35K → 23M31264-233#10453#10686
23M → 24M9439+55#10686#10631
24M → 40K56102-46#10631#10677
40K → 25.2M1864-46#10677#10723
25.2M → Finish9349+44#10723#10679
TOTALS7823786-3006
📊

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