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BOSTON MARATHON 2023

Amanda Blair

Bib: 15404•F

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 37%
Masters (Masters Women)
#0 / 6539
Top 24%
Division (F40-44)
#0 / 1878
Top 43%
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
8:14/mi
25:36
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
51:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:21/mi
1:17:41
↑ 67↓ 78
20K· 12.43 mi
8:26/mi
1:43:52
↑ 106↓ 860.1%
Half· 13.11 mi
8:04/mi
1:49:22
↑ 19↓ 370.5%
25K· 15.53 mi
8:18/mi
2:09:30
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:35:13
↑ 181↓ 1480.2%
20M
8:07/mi
2:46:15
↑ 64↓ 500.2%
21M
8:24/mi
2:54:39
↑ 106↓ 241.6%
35K· 21.75 mi
8:03/mi
3:00:40
↑ 17↓ 861.7%
23M
7:59/mi
3:10:40
↑ 23↓ 630.6%
24M
7:51/mi
3:18:31
↓ 821.3%
40K· 24.85 mi
7:53/mi
3:25:15
↓ 200.3%
25.2M
8:16/mi
3:28:06
↑ 13↓ 160.2%
Finish· 26.22 mi
7:35/mi
3:35:50
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:49:22
Pace8:21 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:28
Pace8:07 /mi
📊Negative Split: 2.7% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:4625:368:1425:36
8:14
-
10K
6.21 mi11:21:5651:468:2026:10
8:25
+0:11
15K
9.32 mi11:47:511:17:418:2025:55
8:21
-0:04
20K
12.43 mi12:14:021:43:528:2126:11
8:26
+0:05
Half
13.11 mi12:19:321:49:228:215:30
8:04
-0:22
25K
15.53 mi12:39:402:09:308:2020:08
8:18
+0:14
30K
18.64 mi13:05:232:35:138:2025:43
8:17
-0:01
20M
20.00 mi13:16:252:46:158:1911:02
8:07
-0:10
21M
21.00 mi13:24:492:54:398:198:24
8:24
+0:17
35K
21.75 mi13:30:503:00:408:186:01
8:03
-0:21
23M
23.00 mi13:40:503:10:408:1710:00
7:59
-0:04
24M
24.00 mi13:48:413:18:318:167:51
7:51
-0:08
40K
24.85 mi13:55:253:25:158:156:44
7:53
+0:02
25.2M
25.20 mi13:58:163:28:068:152:51
8:16
+0:23
Finish
26.22 mi14:06:003:35:508:147:44
7:35
-0:41

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

7:35 /mi

Average Pace

8:14 /mi

Slowest Pace

8:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:10

60% of race

Time at Steady Pace

1:26:40

40% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:14 /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 mi10:55:4625:368:1425:36
8:14
#15727
10K
6.21 mi11:21:5651:468:2026:10
8:25
#16722
15K
9.32 mi11:47:511:17:418:2025:55
8:21
#16752
20K
12.43 mi12:14:021:43:528:2126:11
8:26
#16681
Half
13.11 mi12:19:321:49:228:215:30
8:04
#16588
25K
15.53 mi12:39:402:09:308:2020:08
8:18
#16299
30K
18.64 mi13:05:232:35:138:2025:43
8:17
#15655
20M
20.00 mi13:16:252:46:158:1911:02
8:07
#15315
21M
21.00 mi13:24:492:54:398:198:24
8:24
#14998
35K
21.75 mi13:30:503:00:408:186:01
8:03
#14897
23M
23.00 mi13:40:503:10:408:1710:00
7:59
#14590
24M
24.00 mi13:48:413:18:318:167:51
7:51
#14388
40K
24.85 mi13:55:253:25:158:156:44
7:53
#14196
25.2M
25.20 mi13:58:163:28:068:152:51
8:16
#14078
Finish
26.22 mi14:06:003:35:508:147:44
7:35
#13864
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi157275107510716796(Top 63%)5788(Top 51%)5788(Top 308%)
10K6.21 mi3.10 mi16722-9955723-6165723-61617723(Top 67%)6318(Top 55%)6318(Top 336%)
15K9.32 mi3.11 mi16752-305765-425765-4216796(Top 63%)5788(Top 51%)5788(Top 308%)
20K12.43 mi3.11 mi16681+715722+435722+4316414(Top 62%)5593(Top 49%)5593(Top 298%)
Half13.11 mi0.68 mi16588+935674+485674+4814887(Top 56%)4607(Top 40%)4607(Top 245%)
25K15.53 mi2.42 mi16299+2895509+1655509+16514980(Top 56%)4822(Top 42%)4822(Top 257%)
30K18.64 mi3.11 mi15655+6445157+3525157+35212897(Top 48%)3695(Top 32%)3695(Top 197%)
20M20.00 mi1.36 mi15315+3404971+1864971+18611193(Top 42%)2834(Top 25%)2834(Top 151%)
21M21.00 mi1.00 mi14998+3174792+1794792+1799907(Top 37%)2353(Top 21%)2353(Top 125%)
35K21.75 mi0.75 mi14897+1014745+474745+4712485(Top 47%)3704(Top 32%)3704(Top 197%)
23M23.00 mi1.25 mi14590+3074579+1664579+1669700(Top 36%)2364(Top 21%)2364(Top 126%)
24M24.00 mi1.00 mi14388+2024484+954484+9510207(Top 38%)2700(Top 24%)2700(Top 144%)
40K24.85 mi0.85 mi14196+1924391+934391+939237(Top 35%)2299(Top 20%)2299(Top 122%)
25.2M25.20 mi0.35 mi14078+1184324+674324+678225(Top 31%)1952(Top 17%)1952(Top 104%)
Finish26.22 mi1.02 mi13864+2144210+1144210+1149256(Top 35%)2365(Top 21%)2365(Top 126%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

16796

Females

5788

F40-44

5788

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17723

Females

6318

F40-44

6318

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

16796

Females

5788

F40-44

5788

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

16414

Females

5593

F40-44

5593

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

14887

Females

4607

F40-44

4607

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14980

Females

4822

F40-44

4822

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12897

Females

3695

F40-44

3695

30K→20M

18.6 - 20.0 mi

Top 42%
×5story building
+64ft-50ft

Overall

11193

Females

2834

F40-44

2834

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9907

Females

2353

F40-44

2353

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12485

Females

3704

F40-44

3704

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

9700

Females

2364

F40-44

2364

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10207

Females

2700

F40-44

2700

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9237

Females

2299

F40-44

2299

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8225

Females

1952

F40-44

1952

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

9256

Females

2365

F40-44

2365

Passing Analysis

Category:
Athletes Passed
3324
Passed By
1461
Net Change
+1863
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15727
5K → 10K511046-995#15727#16722
10K → 15K192222-30#16722#16752
15K → 20K205134+71#16752#16681
20K → Half985+93#16681#16588
Half → 25K31526+289#16588#16299
25K → 30K6495+644#16299#15655
30K → 20M3400+340#15655#15315
20M → 21M3181+317#15315#14998
21M → 35K1098+101#14998#14897
35K → 23M3092+307#14897#14590
23M → 24M2064+202#14590#14388
24M → 40K1964+192#14388#14196
40K → 25.2M1180+118#14196#14078
25.2M → Finish2184+214#14078#13864
TOTALS33241461+1863
📊

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