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BOSTON MARATHON 2023

Melanie Lassen

Bib: 9331•F

TX

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0:00
0:00
/ mi
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Overall
#0 / 26622
Top 8%
Gender (Female)
#0 / 11423
Top 0.7%
Age Group (F18-39)
#0 / 4884
Top 1%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
20:07
Rank: #2156
Start → 5K
20:07 | 6:28/mi
10K· 6.21 mi
40:07
Rank: #2265 (-109)
5K → 10K
20:00 | 6:26/mi
15K· 9.32 mi
1:00:08
Rank: #2272 (-7)
10K → 15K
20:01 | 6:27/mi
20K· 12.43 mi
1:20:14
Rank: #2223 (+49)
15K → 20K
20:06 | 6:28/mi
Half· 13.11 mi
1:24:34
Rank: #2207 (+16)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:40:19
Rank: #2190 (+17)
Half → 25K
15:45 | 6:30/mi
30K· 18.64 mi
2:01:31
Rank: #2320 (-130)
25K → 30K
21:12 | 6:49/mi
20M
2:10:31
Rank: #2272 (+48)
30K → 20M
9:00 | 6:37/mi
21M
2:17:29
Rank: #2243 (+29)
20M → 21M
6:58 | 6:58/mi
35K· 21.75 mi
2:22:14
Rank: #2205 (+38)
21M → 35K
4:45 | 6:21/mi
23M
2:30:33
Rank: #2168 (+37)
35K → 23M
8:19 | 6:39/mi
24M
2:36:57
Rank: #2120 (+48)
23M → 24M
6:24 | 6:24/mi
40K· 24.85 mi
2:42:33
Rank: #2080 (+40)
24M → 40K
5:36 | 6:33/mi
25.2M
2:45:01
Rank: #2067 (+13)
40K → 25.2M
2:28 | 7:09/mi
Finish· 26.22 mi
2:51:43
Rank: #2060 (+7)
25.2M → Finish
6:42 | 6:34/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time1:24:34
Pace6:27 /mi
2nd Half
Distance13.11 mi
Time1:27:09
Pace6:39 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:3420:076:2820:07
6:28
-
10K
6.21 mi11:05:3440:076:2720:00
6:26
-0:02
15K
9.32 mi11:25:351:00:086:2720:01
6:27
+0:01
20K
12.43 mi11:45:411:20:146:2720:06
6:28
+0:01
Half
13.11 mi11:50:011:24:346:274:20
6:21
-0:07
25K
15.53 mi12:05:461:40:196:2715:45
6:30
+0:09
30K
18.64 mi12:26:582:01:316:3121:12
6:49
+0:19
20M
20.00 mi12:35:582:10:316:329:00
6:37
-0:12
21M
21.00 mi12:42:562:17:296:336:58
6:58
+0:21
35K
21.75 mi12:47:412:22:146:324:45
6:21
-0:37
23M
23.00 mi12:56:002:30:336:338:19
6:39
+0:18
24M
24.00 mi13:02:242:36:576:326:24
6:24
-0:15
40K
24.85 mi13:08:002:42:336:325:36
6:33
+0:09
25.2M
25.20 mi13:10:282:45:016:332:28
7:09
+0:36
Finish
26.22 mi13:17:102:51:436:336:42
6:34
-0:35

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

6:21 /mi

Average Pace

6:33 /mi

Slowest Pace

7:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:49:15

99% of race

Time at Steady Pace

2:28

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:33 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:45:3420:076:2820:07
6:28
#2156
10K
6.21 mi11:05:3440:076:2720:00
6:26
#2265
15K
9.32 mi11:25:351:00:086:2720:01
6:27
#2272
20K
12.43 mi11:45:411:20:146:2720:06
6:28
#2223
Half
13.11 mi11:50:011:24:346:274:20
6:21
#2207
25K
15.53 mi12:05:461:40:196:2715:45
6:30
#2190
30K
18.64 mi12:26:582:01:316:3121:12
6:49
#2320
20M
20.00 mi12:35:582:10:316:329:00
6:37
#2272
21M
21.00 mi12:42:562:17:296:336:58
6:58
#2243
35K
21.75 mi12:47:412:22:146:324:45
6:21
#2205
23M
23.00 mi12:56:002:30:336:338:19
6:39
#2168
24M
24.00 mi13:02:242:36:576:326:24
6:24
#2120
40K
24.85 mi13:08:002:42:336:325:36
6:33
#2080
25.2M
25.20 mi13:10:282:45:016:332:28
7:09
#2067
Finish
26.22 mi13:17:102:51:436:336:42
6:34
#2060
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi215699992336(Top 9%)92(Top 0.8%)92(Top 2%)
10K6.21 mi3.10 mi2265-10998+198+12442(Top 9%)103(Top 0.9%)103(Top 2%)
15K9.32 mi3.11 mi2272-794+494+42336(Top 9%)92(Top 0.8%)92(Top 2%)
20K12.43 mi3.11 mi2223+4992+292+22138(Top 8%)86(Top 0.8%)86(Top 2%)
Half13.11 mi0.68 mi2207+1691+191+12044(Top 8%)78(Top 0.7%)78(Top 2%)
25K15.53 mi2.42 mi2190+1788+388+32166(Top 8%)87(Top 0.8%)87(Top 2%)
30K18.64 mi3.11 mi2320-13094-694-63156(Top 12%)178(Top 2%)178(Top 4%)
20M20.00 mi1.36 mi2272+4891+391+31974(Top 7%)91(Top 0.8%)91(Top 2%)
21M21.00 mi1.00 mi2243+2991912032(Top 8%)106(Top 0.9%)106(Top 2%)
35K21.75 mi0.75 mi2205+3891911797(Top 7%)88(Top 0.8%)88(Top 2%)
23M23.00 mi1.25 mi2168+3789+289+21953(Top 7%)100(Top 0.9%)100(Top 2%)
24M24.00 mi1.00 mi2120+4884+584+51701(Top 6%)93(Top 0.8%)93(Top 2%)
40K24.85 mi0.85 mi2080+4084841757(Top 7%)103(Top 0.9%)103(Top 2%)
25.2M25.20 mi0.35 mi2067+1383+183+12399(Top 9%)169(Top 1%)169(Top 3%)
Finish26.22 mi1.02 mi2060+784-184-12882(Top 11%)263(Top 2%)263(Top 5%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2336

Females

92

F18-39

92

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2442

Females

103

F18-39

103

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2336

Females

92

F18-39

92

15K→20K

9.3 - 12.4 mi

Top 8%
×5stories
+106ft-86ft

Overall

2138

Females

86

F18-39

86

20K→Half

12.4 - 13.1 mi

Top 8%
×2stories
+19ft-37ft

Overall

2044

Females

78

F18-39

78

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2166

Females

87

F18-39

87

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3156

Females

178

F18-39

178

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1974

Females

91

F18-39

91

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2032

Females

106

F18-39

106

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1797

Females

88

F18-39

88

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1953

Females

100

F18-39

100

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1701

Females

93

F18-39

93

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1757

Females

103

F18-39

103

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2399

Females

169

F18-39

169

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2882

Females

263

F18-39

263

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
702
Passed By
606
Net Change
+96
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2156
5K → 10K70179-109#2156#2265
10K → 15K6976-7#2265#2272
15K → 20K8839+49#2272#2223
20K → Half182+16#2223#2207
Half → 25K5942+17#2207#2190
25K → 30K30160-130#2190#2320
30K → 20M557+48#2320#2272
20M → 21M5122+29#2272#2243
21M → 35K435+38#2243#2205
35K → 23M5316+37#2205#2168
23M → 24M535+48#2168#2120
24M → 40K488+40#2120#2080
40K → 25.2M185+13#2080#2067
25.2M → Finish4740+7#2067#2060
TOTALS702606+96
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing