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BOSTON MARATHON 2023

Chandra Ludlow

Bib: 21537•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
9:02/mi
28:05
↑ 97↓ 3451.5%
10K· 6.21 mi
9:02/mi
56:09
↑ 79↓ 1380.4%
15K· 9.32 mi
9:00/mi
1:24:07
↑ 67↓ 78
20K· 12.43 mi
8:58/mi
1:52:00
↑ 106↓ 860.1%
Half· 13.11 mi
8:51/mi
1:58:02
↑ 19↓ 370.5%
25K· 15.53 mi
9:00/mi
2:19:52
↑ 66↓ 880.2%
30K· 18.64 mi
9:30/mi
2:49:24
↑ 181↓ 1480.2%
20M
9:33/mi
3:02:22
↑ 64↓ 500.2%
21M
9:51/mi
3:12:13
↑ 106↓ 241.6%
35K· 21.75 mi
9:01/mi
3:18:58
↑ 17↓ 861.7%
23M
9:17/mi
3:30:35
↑ 23↓ 630.6%
24M
8:51/mi
3:39:26
↓ 821.3%
40K· 24.85 mi
8:51/mi
3:47:00
↓ 200.3%
25.2M
9:37/mi
3:50:19
↑ 13↓ 160.2%
Finish· 26.22 mi
8:35/mi
3:59:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:02
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:01:02
Pace9:14 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:1028:059:0228:05
9:02
-
10K
6.21 mi11:49:1456:099:0228:04
9:02
0:00
15K
9.32 mi12:17:121:24:079:0127:58
9:00
-0:02
20K
12.43 mi12:45:051:52:009:0127:53
8:58
-0:02
Half
13.11 mi12:51:071:58:029:006:02
8:51
-0:07
25K
15.53 mi13:12:572:19:529:0021:50
9:00
+0:09
30K
18.64 mi13:42:292:49:249:0529:32
9:30
+0:30
20M
20.00 mi13:55:273:02:229:0712:58
9:33
+0:03
21M
21.00 mi14:05:183:12:139:099:51
9:51
+0:18
35K
21.75 mi14:12:033:18:589:096:45
9:01
-0:50
23M
23.00 mi14:23:403:30:359:0911:37
9:17
+0:16
24M
24.00 mi14:32:313:39:269:098:51
8:51
-0:26
40K
24.85 mi14:40:053:47:009:087:34
8:51
0:00
25.2M
25.20 mi14:43:243:50:199:083:19
9:37
+0:46
Finish
26.22 mi14:52:093:59:049:078:45
8:35
-1:02

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

8:35 /mi

Average Pace

9:07 /mi

Slowest Pace

9:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:24

77% of race

Time at Steady Pace

55:40

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:07 /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 mi11:21:1028:059:0228:05
9:02
#20631
10K
6.21 mi11:49:1456:099:0228:04
9:02
#20796
15K
9.32 mi12:17:121:24:079:0127:58
9:00
#20688
20K
12.43 mi12:45:051:52:009:0127:53
8:58
#20421
Half
13.11 mi12:51:071:58:029:006:02
8:51
#20380
25K
15.53 mi13:12:572:19:529:0021:50
9:00
#20136
30K
18.64 mi13:42:292:49:249:0529:32
9:30
#19994
20M
20.00 mi13:55:273:02:229:0712:58
9:33
#19896
21M
21.00 mi14:05:183:12:139:099:51
9:51
#19739
35K
21.75 mi14:12:033:18:589:096:45
9:01
#19673
23M
23.00 mi14:23:403:30:359:0911:37
9:17
#19547
24M
24.00 mi14:32:313:39:269:098:51
8:51
#19427
40K
24.85 mi14:40:053:47:009:087:34
8:51
#19286
25.2M
25.20 mi14:43:243:50:199:083:19
9:37
#19240
Finish
26.22 mi14:52:093:59:049:078:45
8:35
#19152
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi206318186818620516(Top 77%)7964(Top 70%)7964(Top 438%)
10K6.21 mi3.10 mi20796-1658197-118197-1121025(Top 79%)8278(Top 72%)8278(Top 456%)
15K9.32 mi3.11 mi20688+1088118+798118+7920516(Top 77%)7964(Top 70%)7964(Top 438%)
20K12.43 mi3.11 mi20421+2677957+1617957+16119589(Top 74%)7427(Top 65%)7427(Top 409%)
Half13.11 mi0.68 mi20380+417930+277930+2719754(Top 74%)7525(Top 66%)7525(Top 414%)
25K15.53 mi2.42 mi20136+2447781+1497781+14918991(Top 71%)7127(Top 62%)7127(Top 392%)
30K18.64 mi3.11 mi19994+1427727+547727+5419463(Top 73%)7448(Top 65%)7448(Top 410%)
20M20.00 mi1.36 mi19896+987682+457682+4519031(Top 71%)7314(Top 64%)7314(Top 403%)
21M21.00 mi1.00 mi19739+1577590+927590+9217471(Top 66%)6473(Top 57%)6473(Top 356%)
35K21.75 mi0.75 mi19673+667558+327558+3218031(Top 68%)6862(Top 60%)6862(Top 378%)
23M23.00 mi1.25 mi19547+1267492+667492+6617441(Top 66%)6536(Top 57%)6536(Top 360%)
24M24.00 mi1.00 mi19427+1207435+577435+5716525(Top 62%)6101(Top 53%)6101(Top 336%)
40K24.85 mi0.85 mi19286+1417360+757360+7515410(Top 58%)5542(Top 49%)5542(Top 305%)
25.2M25.20 mi0.35 mi19240+467338+227338+2215841(Top 60%)5797(Top 51%)5797(Top 319%)
Finish26.22 mi1.02 mi19152+887295+437295+4315953(Top 60%)5788(Top 51%)5788(Top 319%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

20516

Females

7964

F45-49

7964

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

21025

Females

8278

F45-49

8278

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

20516

Females

7964

F45-49

7964

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19589

Females

7427

F45-49

7427

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

19754

Females

7525

F45-49

7525

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

18991

Females

7127

F45-49

7127

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

19463

Females

7448

F45-49

7448

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

19031

Females

7314

F45-49

7314

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

17471

Females

6473

F45-49

6473

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

18031

Females

6862

F45-49

6862

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

17441

Females

6536

F45-49

6536

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16525

Females

6101

F45-49

6101

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15410

Females

5542

F45-49

5542

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

15841

Females

5797

F45-49

5797

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

15953

Females

5788

F45-49

5788

Passing Analysis

Category:
Athletes Passed
2272
Passed By
793
Net Change
+1479
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20631
5K → 10K217382-165#20631#20796
10K → 15K235127+108#20796#20688
15K → 20K31649+267#20688#20421
20K → Half476+41#20421#20380
Half → 25K27430+244#20380#20136
25K → 30K22684+142#20136#19994
30K → 20M13335+98#19994#19896
20M → 21M17316+157#19896#19739
21M → 35K7913+66#19739#19673
35K → 23M14115+126#19673#19547
23M → 24M1288+120#19547#19427
24M → 40K1443+141#19427#19286
40K → 25.2M515+46#19286#19240
25.2M → Finish10820+88#19240#19152
TOTALS2272793+1479
📊

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