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BOSTON MARATHON 2023

Sara Black

Bib: 9025•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 39%
Masters (Masters Women)
#0 / 6539
Top 26%
Division (F50-54)
#0 / 1207
Top 18%
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
8:02/mi
24:57
↑ 97↓ 3451.5%
10K· 6.21 mi
8:27/mi
51:11
↑ 79↓ 1380.4%
15K· 9.32 mi
8:21/mi
1:17:07
↑ 67↓ 78
20K· 12.43 mi
8:38/mi
1:43:55
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:49:32
↑ 19↓ 370.5%
25K· 15.53 mi
8:22/mi
2:09:49
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:35:32
↑ 181↓ 1480.2%
20M
8:19/mi
2:46:50
↑ 64↓ 500.2%
21M
8:29/mi
2:55:19
↑ 106↓ 241.6%
35K· 21.75 mi
8:08/mi
3:01:24
↑ 17↓ 861.7%
23M
8:11/mi
3:11:39
↑ 23↓ 630.6%
24M
7:58/mi
3:19:37
↓ 821.3%
40K· 24.85 mi
8:04/mi
3:26:31
↓ 200.3%
25.2M
8:22/mi
3:29:24
↑ 13↓ 160.2%
Finish· 26.22 mi
7:43/mi
3:37:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:49:32
Pace8:21 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:47:44
Pace8:13 /mi
📊Negative Split: 1.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5024:578:0224:57
8:02
-
10K
6.21 mi11:20:0451:118:1426:14
8:27
+0:25
15K
9.32 mi11:46:001:17:078:1625:56
8:21
-0:06
20K
12.43 mi12:12:481:43:558:2226:48
8:38
+0:17
Half
13.11 mi12:18:251:49:328:215:37
8:14
-0:24
25K
15.53 mi12:38:422:09:498:2120:17
8:22
+0:08
30K
18.64 mi13:04:252:35:328:2125:43
8:17
-0:05
20M
20.00 mi13:15:432:46:508:2011:18
8:19
+0:02
21M
21.00 mi13:24:122:55:198:218:29
8:29
+0:10
35K
21.75 mi13:30:173:01:248:206:05
8:08
-0:21
23M
23.00 mi13:40:323:11:398:2010:15
8:11
+0:03
24M
24.00 mi13:48:303:19:378:197:58
7:58
-0:13
40K
24.85 mi13:55:243:26:318:196:54
8:04
+0:06
25.2M
25.20 mi13:58:173:29:248:192:53
8:22
+0:18
Finish
26.22 mi14:06:093:37:168:187:52
7:43
-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

7:43 /mi

Average Pace

8:18 /mi

Slowest Pace

8:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:28

88% of race

Time at Steady Pace

26:48

12% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:17 /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 mi10:53:5024:578:0224:57
8:02
#14250
10K
6.21 mi11:20:0451:118:1426:14
8:27
#16095
15K
9.32 mi11:46:001:17:078:1625:56
8:21
#16323
20K
12.43 mi12:12:481:43:558:2226:48
8:38
#16716
Half
13.11 mi12:18:251:49:328:215:37
8:14
#16667
25K
15.53 mi12:38:422:09:498:2120:17
8:22
#16454
30K
18.64 mi13:04:252:35:328:2125:43
8:17
#15771
20M
20.00 mi13:15:432:46:508:2011:18
8:19
#15507
21M
21.00 mi13:24:122:55:198:218:29
8:29
#15196
35K
21.75 mi13:30:173:01:248:206:05
8:08
#15112
23M
23.00 mi13:40:323:11:398:2010:15
8:11
#14886
24M
24.00 mi13:48:303:19:378:197:58
7:58
#14700
40K
24.85 mi13:55:243:26:318:196:54
8:04
#14531
25.2M
25.20 mi13:58:173:29:248:192:53
8:22
#14445
Finish
26.22 mi14:06:093:37:168:187:52
7:43
#14259
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi142504178417816830(Top 63%)5810(Top 51%)5810(Top 481%)
10K6.21 mi3.10 mi16095-18455336-11585336-115817893(Top 67%)6414(Top 56%)6414(Top 531%)
15K9.32 mi3.11 mi16323-2285481-1455481-14516830(Top 63%)5810(Top 51%)5810(Top 481%)
20K12.43 mi3.11 mi16716-3935745-2645745-26417660(Top 66%)6322(Top 55%)6322(Top 524%)
Half13.11 mi0.68 mi16667+495725+205725+2016020(Top 60%)5288(Top 46%)5288(Top 438%)
25K15.53 mi2.42 mi16454+2135610+1155610+11515362(Top 58%)5051(Top 44%)5051(Top 418%)
30K18.64 mi3.11 mi15771+6835234+3765234+37612900(Top 48%)3698(Top 32%)3698(Top 306%)
20M20.00 mi1.36 mi15507+2645093+1415093+14112486(Top 47%)3579(Top 31%)3579(Top 297%)
21M21.00 mi1.00 mi15196+3114921+1724921+17210437(Top 39%)2608(Top 23%)2608(Top 216%)
35K21.75 mi0.75 mi15112+844886+354886+3513049(Top 49%)4035(Top 35%)4035(Top 334%)
23M23.00 mi1.25 mi14886+2264763+1234763+12311144(Top 42%)3098(Top 27%)3098(Top 257%)
24M24.00 mi1.00 mi14700+1864677+864677+8611060(Top 42%)3133(Top 27%)3133(Top 260%)
40K24.85 mi0.85 mi14531+1694595+824595+8210574(Top 40%)2936(Top 26%)2936(Top 243%)
25.2M25.20 mi0.35 mi14445+864552+434552+438800(Top 33%)2203(Top 19%)2203(Top 183%)
Finish26.22 mi1.02 mi14259+1864463+894463+8910151(Top 38%)2782(Top 24%)2782(Top 230%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

16830

Females

5810

F50-54

5810

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17893

Females

6414

F50-54

6414

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

16830

Females

5810

F50-54

5810

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

17660

Females

6322

F50-54

6322

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

16020

Females

5288

F50-54

5288

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

15362

Females

5051

F50-54

5051

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12900

Females

3698

F50-54

3698

30K→20M

18.6 - 20.0 mi

Top 47%
×5story building
+64ft-50ft

Overall

12486

Females

3579

F50-54

3579

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

10437

Females

2608

F50-54

2608

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

13049

Females

4035

F50-54

4035

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11144

Females

3098

F50-54

3098

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11060

Females

3133

F50-54

3133

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10574

Females

2936

F50-54

2936

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8800

Females

2203

F50-54

2203

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10151

Females

2782

F50-54

2782

Passing Analysis

Category:
Athletes Passed
2729
Passed By
2738
Net Change
-9
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14250
5K → 10K141859-1845#14250#16095
10K → 15K117345-228#16095#16323
15K → 20K74467-393#16323#16716
20K → Half578+49#16716#16667
Half → 25K24835+213#16667#16454
25K → 30K6863+683#16454#15771
30K → 20M2651+264#15771#15507
20M → 21M3121+311#15507#15196
21M → 35K917+84#15196#15112
35K → 23M2282+226#15112#14886
23M → 24M1871+186#14886#14700
24M → 40K1712+169#14700#14531
40K → 25.2M860+86#14531#14445
25.2M → Finish1937+186#14445#14259
TOTALS27292738-9
📊

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