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BOSTON MARATHON 2023

Laura Zaunbrecher

Bib: 11810•F

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 22%
Gender (Female)
#0 / 11423
Top 5%
Masters (Masters Women)
#0 / 6539
Top 2%
Division (F40-44)
#0 / 1878
Top 4%
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
7:36/mi
23:36
↑ 97↓ 3451.5%
10K· 6.21 mi
7:10/mi
45:52
↑ 79↓ 1380.4%
15K· 9.32 mi
7:08/mi
1:08:03
↑ 67↓ 78
20K· 12.43 mi
7:11/mi
1:30:23
↑ 106↓ 860.1%
Half· 13.11 mi
7:02/mi
1:35:11
↑ 19↓ 370.5%
25K· 15.53 mi
7:06/mi
1:52:25
↑ 66↓ 880.2%
30K· 18.64 mi
7:10/mi
2:14:41
↑ 181↓ 1480.2%
20M
7:10/mi
2:24:26
↑ 64↓ 500.2%
21M
7:34/mi
2:32:00
↑ 106↓ 241.6%
35K· 21.75 mi
6:46/mi
2:37:04
↑ 17↓ 861.7%
23M
7:05/mi
2:45:56
↑ 23↓ 630.6%
24M
6:51/mi
2:52:47
↓ 821.3%
40K· 24.85 mi
6:56/mi
2:58:43
↓ 200.3%
25.2M
7:21/mi
3:01:15
↑ 13↓ 160.2%
Finish· 26.22 mi
6:42/mi
3:08:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:35:11
Pace7:16 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:32:54
Pace7:05 /mi
📊Negative Split: 2.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:3023:367:3623:36
7:36
-
10K
6.21 mi11:12:4645:527:2322:16
7:10
-0:26
15K
9.32 mi11:34:571:08:037:1822:11
7:08
-0:02
20K
12.43 mi11:57:171:30:237:1622:20
7:11
+0:03
Half
13.11 mi12:02:051:35:117:164:48
7:02
-0:09
25K
15.53 mi12:19:191:52:257:1417:14
7:06
+0:04
30K
18.64 mi12:41:352:14:417:1422:16
7:10
+0:04
20M
20.00 mi12:51:202:24:267:139:45
7:10
0:00
21M
21.00 mi12:58:542:32:007:147:34
7:34
+0:24
35K
21.75 mi13:03:582:37:047:135:04
6:46
-0:48
23M
23.00 mi13:12:502:45:567:138:52
7:05
+0:19
24M
24.00 mi13:19:412:52:477:126:51
6:51
-0:14
40K
24.85 mi13:25:372:58:437:115:56
6:56
+0:05
25.2M
25.20 mi13:28:093:01:157:122:32
7:21
+0:25
Finish
26.22 mi13:34:593:08:057:116:50
6:42
-0:39

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

6:42 /mi

Average Pace

7:11 /mi

Slowest Pace

7:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:55

83% of race

Time at Steady Pace

31:10

17% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:10 /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 mi10:50:3023:367:3623:36
7:36
#10503
10K
6.21 mi11:12:4645:527:2322:16
7:10
#9040
15K
9.32 mi11:34:571:08:037:1822:11
7:08
#8473
20K
12.43 mi11:57:171:30:237:1622:20
7:11
#8062
Half
13.11 mi12:02:051:35:117:164:48
7:02
#7989
25K
15.53 mi12:19:191:52:257:1417:14
7:06
#7628
30K
18.64 mi12:41:352:14:417:1422:16
7:10
#7130
20M
20.00 mi12:51:202:24:267:139:45
7:10
#6951
21M
21.00 mi12:58:542:32:007:147:34
7:34
#6814
35K
21.75 mi13:03:582:37:047:135:04
6:46
#6688
23M
23.00 mi13:12:502:45:567:138:52
7:05
#6498
24M
24.00 mi13:19:412:52:477:126:51
6:51
#6319
40K
24.85 mi13:25:372:58:437:115:56
6:56
#6177
25.2M
25.20 mi13:28:093:01:157:122:32
7:21
#6107
Finish
26.22 mi13:34:593:08:057:116:50
6:42
#5962
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi10503207720777410(Top 28%)862(Top 8%)862(Top 46%)
10K6.21 mi3.10 mi9040+14631435+6421435+6427885(Top 30%)1010(Top 9%)1010(Top 54%)
15K9.32 mi3.11 mi8473+5671207+2281207+2287410(Top 28%)862(Top 8%)862(Top 46%)
20K12.43 mi3.11 mi8062+4111075+1321075+1327032(Top 26%)788(Top 7%)788(Top 42%)
Half13.11 mi0.68 mi7989+731054+211054+216795(Top 26%)692(Top 6%)692(Top 37%)
25K15.53 mi2.42 mi7628+361942+112942+1126169(Top 23%)595(Top 5%)595(Top 32%)
30K18.64 mi3.11 mi7130+498809+133809+1335327(Top 20%)465(Top 4%)465(Top 25%)
20M20.00 mi1.36 mi6951+179771+38771+385016(Top 19%)462(Top 4%)462(Top 25%)
21M21.00 mi1.00 mi6814+137750+21750+214951(Top 19%)512(Top 4%)512(Top 27%)
35K21.75 mi0.75 mi6688+126733+17733+174076(Top 15%)344(Top 3%)344(Top 18%)
23M23.00 mi1.25 mi6498+190699+34699+344249(Top 16%)362(Top 3%)362(Top 19%)
24M24.00 mi1.00 mi6319+179661+38661+383966(Top 15%)346(Top 3%)346(Top 18%)
40K24.85 mi0.85 mi6177+142637+24637+243569(Top 13%)328(Top 3%)328(Top 17%)
25.2M25.20 mi0.35 mi6107+70625+12625+123268(Top 12%)298(Top 3%)298(Top 16%)
Finish26.22 mi1.02 mi5962+145601+24601+243580(Top 13%)376(Top 3%)376(Top 20%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

7410

Females

862

F40-44

862

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

7885

Females

1010

F40-44

1010

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

7410

Females

862

F40-44

862

15K→20K

9.3 - 12.4 mi

Top 26%
×5story building
+106ft-86ft

Overall

7032

Females

788

F40-44

788

20K→Half

12.4 - 13.1 mi

Top 26%
×2story building
+19ft-37ft

Overall

6795

Females

692

F40-44

692

Half→25K

13.1 - 15.5 mi

Top 23%
×4story building
+66ft-88ft

Overall

6169

Females

595

F40-44

595

25K→30K

15.5 - 18.6 mi

Top 20%
×9story building
+181ft-148ft

Overall

5327

Females

465

F40-44

465

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

5016

Females

462

F40-44

462

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

4951

Females

512

F40-44

512

21M→35K

21.0 - 21.8 mi

Top 15%
×7story building
+17ft-86ft

Overall

4076

Females

344

F40-44

344

35K→23M

21.8 - 23.0 mi

Top 16%
×5story building
+23ft-63ft

Overall

4249

Females

362

F40-44

362

23M→24M

23.0 - 24.0 mi

Top 15%
×6story building
+12ft-82ft

Overall

3966

Females

346

F40-44

346

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3569

Females

328

F40-44

328

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3268

Females

298

F40-44

298

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2story building
+22ft-21ft

Overall

3580

Females

376

F40-44

376

Passing Analysis

Category:
Athletes Passed
4602*
Passed By
61
Net Change
+4541
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10503
5K → 10K1484*21+1463#10503#9040
10K → 15K57710+567#9040#8473
15K → 20K4209+411#8473#8062
20K → Half730+73#8062#7989
Half → 25K3610+361#7989#7628
25K → 30K5002+498#7628#7130
30K → 20M1801+179#7130#6951
20M → 21M1436+137#6951#6814
21M → 35K1271+126#6814#6688
35K → 23M1922+190#6688#6498
23M → 24M1823+179#6498#6319
24M → 40K1431+142#6319#6177
40K → 25.2M722+70#6177#6107
25.2M → Finish1483+145#6107#5962
TOTALS4602*61+4541

* 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