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BOSTON MARATHON 2023

Erin Zackey

Bib: 19135•F

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 42%
Masters (Masters Women)
#0 / 6539
Top 29%
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:35
Rank: #15694
Start → 5K
8:14/mi
25:35 split
10K· 6.21 mi
50:41
Rank: #15513 (+181)
5K → 10K
8:05/mi
25:06 split
15K· 9.32 mi
1:15:47
Rank: #15348 (+165)
10K → 15K
8:05/mi
25:06 split
20K· 12.43 mi
1:41:22
Rank: #15300 (+48)
15K → 20K
8:14/mi
25:35 split
Half· 13.11 mi
1:46:57
Rank: #15300
20K → Half
8:11/mi
5:35 split
25K· 15.53 mi
2:06:47
Rank: #15079 (+221)
Half → 25K
8:11/mi
19:50 split
30K· 18.64 mi
2:33:06
Rank: #14905 (+174)
25K → 30K
8:28/mi
26:19 split
20M
2:45:01
Rank: #14915 (-10)
30K → 20M
8:46/mi
11:55 split
21M
2:54:28
Rank: #14943 (-28)
20M → 21M
9:27/mi
9:27 split
35K· 21.75 mi
3:00:46
Rank: #14934 (+9)
21M → 35K
8:25/mi
6:18 split
23M
3:11:51
Rank: #14942 (-8)
35K → 23M
8:51/mi
11:05 split
24M
3:20:12
Rank: #14854 (+88)
23M → 24M
8:21/mi
8:21 split
40K· 24.85 mi
3:27:35
Rank: #14794 (+60)
24M → 40K
8:38/mi
7:23 split
25.2M
3:30:48
Rank: #14775 (+19)
40K → 25.2M
9:20/mi
3:13 split
Finish· 26.22 mi
3:39:24
Rank: #14784 (-9)
25.2M → Finish
8:26/mi
8:36 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:57
Pace8:09 /mi
2nd Half
Distance13.11 mi
Time1:52:27
Pace8:35 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4825:358:1425:35
8:14
-
10K
6.21 mi11:47:5450:418:0925:06
8:05
-0:09
15K
9.32 mi12:13:001:15:478:0825:06
8:05
0:00
20K
12.43 mi12:38:351:41:228:0925:35
8:14
+0:09
Half
13.11 mi12:44:101:46:578:095:35
8:11
-0:03
25K
15.53 mi13:04:002:06:478:1019:50
8:11
0:00
30K
18.64 mi13:30:192:33:068:1326:19
8:28
+0:17
20M
20.00 mi13:42:142:45:018:1511:55
8:46
+0:18
21M
21.00 mi13:51:412:54:288:189:27
9:27
+0:41
35K
21.75 mi13:57:593:00:468:196:18
8:25
-1:02
23M
23.00 mi14:09:043:11:518:2011:05
8:51
+0:26
24M
24.00 mi14:17:253:20:128:218:21
8:21
-0:30
40K
24.85 mi14:24:483:27:358:217:23
8:38
+0:17
25.2M
25.20 mi14:28:013:30:488:223:13
9:20
+0:42
Finish
26.22 mi14:36:373:39:248:228:36
8:26
-0:54

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

8:05 /mi

Average Pace

8:22 /mi

Slowest Pace

9:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:44

94% of race

Time at Steady Pace

12:40

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:22 /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 mi11:22:4825:358:1425:35
8:14
#15694
10K
6.21 mi11:47:5450:418:0925:06
8:05
#15513
15K
9.32 mi12:13:001:15:478:0825:06
8:05
#15348
20K
12.43 mi12:38:351:41:228:0925:35
8:14
#15300
Half
13.11 mi12:44:101:46:578:095:35
8:11
#15300
25K
15.53 mi13:04:002:06:478:1019:50
8:11
#15079
30K
18.64 mi13:30:192:33:068:1326:19
8:28
#14905
20M
20.00 mi13:42:142:45:018:1511:55
8:46
#14915
21M
21.00 mi13:51:412:54:288:189:27
9:27
#14943
35K
21.75 mi13:57:593:00:468:196:18
8:25
#14934
23M
23.00 mi14:09:043:11:518:2011:05
8:51
#14942
24M
24.00 mi14:17:253:20:128:218:21
8:21
#14854
40K
24.85 mi14:24:483:27:358:217:23
8:38
#14794
25.2M
25.20 mi14:28:013:30:488:223:13
9:20
#14775
Finish
26.22 mi14:36:373:39:248:228:36
8:26
#14784
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi156945091509115031(Top 56%)4697(Top 41%)4697(Top 250%)
10K6.21 mi3.10 mi15513+1814978+1134978+11315375(Top 58%)4896(Top 43%)4896(Top 261%)
15K9.32 mi3.11 mi15348+1654882+964882+9615031(Top 56%)4697(Top 41%)4697(Top 250%)
20K12.43 mi3.11 mi15300+484872+104872+1015182(Top 57%)4823(Top 42%)4823(Top 257%)
Half13.11 mi0.68 mi153004877-54877-515711(Top 59%)5117(Top 45%)5117(Top 272%)
25K15.53 mi2.42 mi15079+2214758+1194758+11914111(Top 53%)4295(Top 38%)4295(Top 229%)
30K18.64 mi3.11 mi14905+1744682+764682+7614128(Top 53%)4411(Top 39%)4411(Top 235%)
20M20.00 mi1.36 mi14915-104715-334715-3315261(Top 57%)5141(Top 45%)5141(Top 274%)
21M21.00 mi1.00 mi14943-284758-434758-4315738(Top 59%)5473(Top 48%)5473(Top 291%)
35K21.75 mi0.75 mi14934+94772-144772-1414870(Top 56%)5025(Top 44%)5025(Top 268%)
23M23.00 mi1.25 mi14942-84800-284800-2815294(Top 57%)5334(Top 47%)5334(Top 284%)
24M24.00 mi1.00 mi14854+884763+374763+3713565(Top 51%)4434(Top 39%)4434(Top 236%)
40K24.85 mi0.85 mi14794+604758+54758+514189(Top 53%)4851(Top 42%)4851(Top 258%)
25.2M25.20 mi0.35 mi14775+194756+24756+214379(Top 54%)4949(Top 43%)4949(Top 264%)
Finish26.22 mi1.02 mi14784-94779-234779-2315031(Top 56%)5266(Top 46%)5266(Top 280%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21stories
+97ft-345ft

Overall

15031

Females

4697

F40-44

4697

5K→10K

3.1 - 6.2 mi

Top 58%
×5stories
+79ft-138ft

Overall

15375

Females

4896

F40-44

4896

10K→15K

6.2 - 9.3 mi

Top 56%
×3stories
+67ft-78ft

Overall

15031

Females

4697

F40-44

4697

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

15182

Females

4823

F40-44

4823

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

15711

Females

5117

F40-44

5117

Half→25K

13.1 - 15.5 mi

Top 53%
×4stories
+66ft-88ft

Overall

14111

Females

4295

F40-44

4295

25K→30K

15.5 - 18.6 mi

Top 53%
×9stories
+181ft-148ft

Overall

14128

Females

4411

F40-44

4411

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

15261

Females

5141

F40-44

5141

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

15738

Females

5473

F40-44

5473

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

14870

Females

5025

F40-44

5025

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

15294

Females

5334

F40-44

5334

23M→24M

23.0 - 24.0 mi

Top 51%
×6stories
+12ft-82ft

Overall

13565

Females

4434

F40-44

4434

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14189

Females

4851

F40-44

4851

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14379

Females

4949

F40-44

4949

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

15031

Females

5266

F40-44

5266

Passing Analysis

Category:
Athletes Passed
1992
Passed By
1082
Net Change
+910
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15694
5K → 10K387206+181#15694#15513
10K → 15K281116+165#15513#15348
15K → 20K194146+48#15348#15300
20K → Half34340#15300#15300
Half → 25K25433+221#15300#15079
25K → 30K27096+174#15079#14905
30K → 20M7383-10#14905#14915
20M → 21M79107-28#14915#14943
21M → 35K5344+9#14943#14934
35K → 23M7886-8#14934#14942
23M → 24M11022+88#14942#14854
24M → 40K8828+60#14854#14794
40K → 25.2M3516+19#14794#14775
25.2M → Finish5665-9#14775#14784
TOTALS19921082+910
📊

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