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BOSTON MARATHON 2024

Erin Nachreiner Mackesey

Bib: 13420•F

WI

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 38%
Gender (Female)
#0 / 10924
Top 23%
Division (F18-39)
#0 / 4660
Top 38%
Race Day Weather
55°/45°F
scattered 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
7:45/mi
24:05
↑ 97↓ 3451.5%
10K· 6.21 mi
7:43/mi
48:04
↑ 79↓ 1380.4%
15K· 9.32 mi
7:42/mi
1:12:00
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:36:17
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:41:39
↑ 19↓ 370.5%
25K· 15.53 mi
7:57/mi
2:00:55
↑ 66↓ 880.2%
30K· 18.64 mi
8:12/mi
2:26:24
↑ 181↓ 1480.2%
20M
8:17/mi
2:37:40
↑ 64↓ 500.2%
21M
8:53/mi
2:46:33
↑ 106↓ 241.6%
35K· 21.75 mi
8:23/mi
2:52:49
↑ 17↓ 861.7%
23M
8:30/mi
3:03:28
↑ 23↓ 630.6%
24M
8:20/mi
3:11:48
↓ 821.3%
40K· 24.85 mi
8:31/mi
3:19:05
↓ 200.3%
25.2M
9:11/mi
3:22:15
↑ 13↓ 160.2%
Finish· 26.22 mi
7:55/mi
3:30:19
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:39
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:48:40
Pace8:17 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5724:057:4524:05
7:45
-
10K
6.21 mi11:17:5648:047:4423:59
7:43
-0:02
15K
9.32 mi11:41:521:12:007:4323:56
7:42
-0:01
20K
12.43 mi12:06:091:36:177:4524:17
7:49
+0:07
Half
13.11 mi12:11:311:41:397:455:22
7:52
+0:03
25K
15.53 mi12:30:472:00:557:4719:16
7:57
+0:05
30K
18.64 mi12:56:162:26:247:5125:29
8:12
+0:15
20M
20.00 mi13:07:322:37:407:5311:16
8:17
+0:05
21M
21.00 mi13:16:252:46:337:568:53
8:53
+0:36
35K
21.75 mi13:22:412:52:497:576:16
8:23
-0:30
23M
23.00 mi13:33:203:03:287:5910:39
8:30
+0:07
24M
24.00 mi13:41:403:11:488:008:20
8:20
-0:10
40K
24.85 mi13:48:573:19:058:017:17
8:31
+0:11
25.2M
25.20 mi13:52:073:22:158:023:10
9:11
+0:40
Finish
26.22 mi14:00:113:30:198:028:04
7:55
-1:16

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

7:42 /mi

Average Pace

8:02 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:20

86% of race

Time at Steady Pace

26:49

13% of race

Time at Slower Pace

3:10

2% of race

Average Pace: 8:01 /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 mi10:53:5724:057:4524:05
7:45
#12729
10K
6.21 mi11:17:5648:047:4423:59
7:43
#12372
15K
9.32 mi11:41:521:12:007:4323:56
7:42
#11939
20K
12.43 mi12:06:091:36:177:4524:17
7:49
#11513
Half
13.11 mi12:11:311:41:397:455:22
7:52
#11510
25K
15.53 mi12:30:472:00:557:4719:16
7:57
#11171
30K
18.64 mi12:56:162:26:247:5125:29
8:12
#10648
20M
20.00 mi13:07:322:37:407:5311:16
8:17
#10385
21M
21.00 mi13:16:252:46:337:568:53
8:53
#10161
35K
21.75 mi13:22:412:52:497:576:16
8:23
#10131
23M
23.00 mi13:33:203:03:287:5910:39
8:30
#9968
24M
24.00 mi13:41:403:11:488:008:20
8:20
#9862
40K
24.85 mi13:48:573:19:058:017:17
8:31
#9785
25.2M
25.20 mi13:52:073:22:158:023:10
9:11
#9726
Finish
26.22 mi14:00:113:30:198:028:04
7:55
#9641
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi127293555355511226(Top 44%)2804(Top 26%)2804(Top 60%)
10K6.21 mi3.10 mi12372+3573380+1753380+17512028(Top 47%)3207(Top 29%)3207(Top 69%)
15K9.32 mi3.11 mi11939+4333169+2113169+21111226(Top 44%)2804(Top 26%)2804(Top 60%)
20K12.43 mi3.11 mi11513+4262945+2242945+22410541(Top 41%)2593(Top 24%)2593(Top 56%)
Half13.11 mi0.68 mi11510+32953-82953-811806(Top 46%)3216(Top 29%)3216(Top 69%)
25K15.53 mi2.42 mi11171+3392814+1392814+1399855(Top 39%)2415(Top 22%)2415(Top 52%)
30K18.64 mi3.11 mi10648+5232642+1722642+1729025(Top 35%)2226(Top 20%)2226(Top 48%)
20M20.00 mi1.36 mi10385+2632570+722570+728353(Top 33%)2162(Top 20%)2162(Top 46%)
21M21.00 mi1.00 mi10161+2242511+592511+598027(Top 31%)2191(Top 20%)2191(Top 47%)
35K21.75 mi0.75 mi10131+302531-202531-2010023(Top 39%)3233(Top 30%)3233(Top 69%)
23M23.00 mi1.25 mi9968+1632521+102521+108529(Top 33%)2634(Top 24%)2634(Top 57%)
24M24.00 mi1.00 mi9862+1062509+122509+128486(Top 33%)2702(Top 25%)2702(Top 58%)
40K24.85 mi0.85 mi9785+772503+62503+68459(Top 33%)2792(Top 26%)2792(Top 60%)
25.2M25.20 mi0.35 mi9726+592494+92494+97454(Top 29%)2403(Top 22%)2403(Top 52%)
Finish26.22 mi1.02 mi9641+852483+112483+118057(Top 32%)2609(Top 24%)2609(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21story building
+97ft-345ft

Overall

11226

Females

2804

F18-39

2804

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

12028

Females

3207

F18-39

3207

10K→15K

6.2 - 9.3 mi

Top 44%
×3story building
+67ft-78ft

Overall

11226

Females

2804

F18-39

2804

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

10541

Females

2593

F18-39

2593

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

11806

Females

3216

F18-39

3216

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

9855

Females

2415

F18-39

2415

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9025

Females

2226

F18-39

2226

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

8353

Females

2162

F18-39

2162

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8027

Females

2191

F18-39

2191

21M→35K

21.0 - 21.8 mi

Top 39%
×7story building
+17ft-86ft

Overall

10023

Females

3233

F18-39

3233

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8529

Females

2634

F18-39

2634

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8486

Females

2702

F18-39

2702

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8459

Females

2792

F18-39

2792

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7454

Females

2403

F18-39

2403

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8057

Females

2609

F18-39

2609

Passing Analysis

Category:
Athletes Passed
3752*
Passed By
664
Net Change
+3088
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12729
5K → 10K493136+357#12729#12372
10K → 15K47744+433#12372#11939
15K → 20K47347+426#11939#11513
20K → Half4138+3#11513#11510
Half → 25K38546+339#11510#11171
25K → 30K57653+523#11171#10648
30K → 20M29229+263#10648#10385
20M → 21M25430+224#10385#10161
21M → 35K8656+30#10161#10131
35K → 23M225*62+163#10131#9968
23M → 24M148*42+106#9968#9862
24M → 40K11639+77#9862#9785
40K → 25.2M7213+59#9785#9726
25.2M → Finish11429+85#9726#9641
TOTALS3752*664+3088

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

📊

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