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BOSTON MARATHON 2023

Lucia Alzaga

Bib: 17775•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 44%
Masters (Masters Women)
#0 / 6539
Top 33%
Division (F45-49)
#0 / 1817
Top 37%
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
8:21/mi
25:58
↑ 97↓ 3451.5%
10K· 6.21 mi
8:14/mi
51:34
↑ 79↓ 1380.4%
15K· 9.32 mi
8:19/mi
1:17:25
↑ 67↓ 78
20K· 12.43 mi
8:31/mi
1:43:52
↑ 106↓ 860.1%
Half· 13.11 mi
8:30/mi
1:49:40
↑ 19↓ 370.5%
25K· 15.53 mi
8:37/mi
2:10:34
↑ 66↓ 880.2%
30K· 18.64 mi
8:57/mi
2:38:21
↑ 181↓ 1480.2%
20M
8:34/mi
2:50:00
↑ 64↓ 500.2%
21M
8:58/mi
2:58:58
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
3:05:06
↑ 17↓ 861.7%
23M
8:18/mi
3:15:30
↑ 23↓ 630.6%
24M
7:47/mi
3:23:17
↓ 821.3%
40K· 24.85 mi
8:04/mi
3:30:11
↓ 200.3%
25.2M
8:42/mi
3:33:11
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:41:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:40
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time1:51:40
Pace8:31 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0625:588:2125:58
8:21
-
10K
6.21 mi11:42:4251:348:1825:36
8:14
-0:07
15K
9.32 mi12:08:331:17:258:1825:51
8:19
+0:05
20K
12.43 mi12:35:001:43:528:2126:27
8:31
+0:12
Half
13.11 mi12:40:481:49:408:225:48
8:30
-0:01
25K
15.53 mi13:01:422:10:348:2420:54
8:37
+0:07
30K
18.64 mi13:29:292:38:218:3027:47
8:57
+0:20
20M
20.00 mi13:41:082:50:008:3011:39
8:34
-0:23
21M
21.00 mi13:50:062:58:588:318:58
8:58
+0:24
35K
21.75 mi13:56:143:05:068:316:08
8:12
-0:46
23M
23.00 mi14:06:383:15:308:3010:24
8:18
+0:06
24M
24.00 mi14:14:253:23:178:287:47
7:47
-0:31
40K
24.85 mi14:21:193:30:118:276:54
8:04
+0:17
25.2M
25.20 mi14:24:193:33:118:283:00
8:42
+0:38
Finish
26.22 mi14:32:283:41:208:278:09
8:00
-0:42

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

7:47 /mi

Average Pace

8:27 /mi

Slowest Pace

8:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:29:02

67% of race

Time at Steady Pace

1:12:18

33% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:26 /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 mi11:17:0625:588:2125:58
8:21
#16577
10K
6.21 mi11:42:4251:348:1825:36
8:14
#16495
15K
9.32 mi12:08:331:17:258:1825:51
8:19
#16562
20K
12.43 mi12:35:001:43:528:2126:27
8:31
#16682
Half
13.11 mi12:40:481:49:408:225:48
8:30
#16733
25K
15.53 mi13:01:422:10:348:2420:54
8:37
#16766
30K
18.64 mi13:29:292:38:218:3027:47
8:57
#16743
20M
20.00 mi13:41:082:50:008:3011:39
8:34
#16534
21M
21.00 mi13:50:062:58:588:318:58
8:58
#16327
35K
21.75 mi13:56:143:05:068:316:08
8:12
#16217
23M
23.00 mi14:06:383:15:308:3010:24
8:18
#15956
24M
24.00 mi14:14:253:23:178:287:47
7:47
#15672
40K
24.85 mi14:21:193:30:118:276:54
8:04
#15495
25.2M
25.20 mi14:24:193:33:118:283:00
8:42
#15409
Finish
26.22 mi14:32:283:41:208:278:09
8:00
#15266
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi165775652565216673(Top 63%)5715(Top 50%)5715(Top 315%)
10K6.21 mi3.10 mi16495+825575+775575+7716530(Top 62%)5595(Top 49%)5595(Top 308%)
15K9.32 mi3.11 mi16562-675641-665641-6616673(Top 63%)5715(Top 50%)5715(Top 315%)
20K12.43 mi3.11 mi16682-1205723-825723-8216949(Top 64%)5896(Top 52%)5896(Top 324%)
Half13.11 mi0.68 mi16733-515765-425765-4217717(Top 67%)6295(Top 55%)6295(Top 346%)
25K15.53 mi2.42 mi16766-335809-445809-4416917(Top 64%)5957(Top 52%)5957(Top 328%)
30K18.64 mi3.11 mi16743+235822-135822-1316881(Top 63%)5995(Top 52%)5995(Top 330%)
20M20.00 mi1.36 mi16534+2095722+1005722+10014116(Top 53%)4488(Top 39%)4488(Top 247%)
21M21.00 mi1.00 mi16327+2075614+1085614+10813250(Top 50%)4085(Top 36%)4085(Top 225%)
35K21.75 mi0.75 mi16217+1105563+515563+5113496(Top 51%)4295(Top 38%)4295(Top 236%)
23M23.00 mi1.25 mi15956+2615435+1285435+12811982(Top 45%)3520(Top 31%)3520(Top 194%)
24M24.00 mi1.00 mi15672+2845287+1485287+1489733(Top 37%)2482(Top 22%)2482(Top 137%)
40K24.85 mi0.85 mi15495+1775190+975190+9710580(Top 40%)2942(Top 26%)2942(Top 162%)
25.2M25.20 mi0.35 mi15409+865140+505140+5010879(Top 41%)3153(Top 28%)3153(Top 174%)
Finish26.22 mi1.02 mi15266+1435060+805060+8012170(Top 46%)3799(Top 33%)3799(Top 209%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

16673

Females

5715

F45-49

5715

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

16530

Females

5595

F45-49

5595

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

16673

Females

5715

F45-49

5715

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

16949

Females

5896

F45-49

5896

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17717

Females

6295

F45-49

6295

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

16917

Females

5957

F45-49

5957

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

16881

Females

5995

F45-49

5995

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14116

Females

4488

F45-49

4488

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

13250

Females

4085

F45-49

4085

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

13496

Females

4295

F45-49

4295

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

11982

Females

3520

F45-49

3520

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9733

Females

2482

F45-49

2482

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10580

Females

2942

F45-49

2942

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10879

Females

3153

F45-49

3153

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12170

Females

3799

F45-49

3799

Passing Analysis

Category:
Athletes Passed
2493
Passed By
1182
Net Change
+1311
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16577
5K → 10K348266+82#16577#16495
10K → 15K170237-67#16495#16562
15K → 20K133253-120#16562#16682
20K → Half1465-51#16682#16733
Half → 25K116149-33#16733#16766
25K → 30K186163+23#16766#16743
30K → 20M22213+209#16743#16534
20M → 21M2103+207#16534#16327
21M → 35K1166+110#16327#16217
35K → 23M2698+261#16217#15956
23M → 24M2840+284#15956#15672
24M → 40K1770+177#15672#15495
40K → 25.2M893+86#15495#15409
25.2M → Finish15916+143#15409#15266
TOTALS24931182+1311
📊

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