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BOSTON MARATHON 2023

Ziyu Lu

Bib: 21857•F

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
8:39/mi
26:54
↑ 97↓ 3451.5%
10K· 6.21 mi
8:39/mi
53:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:49/mi
1:21:08
↑ 67↓ 78
20K· 12.43 mi
9:00/mi
1:49:05
↑ 106↓ 860.1%
Half· 13.11 mi
8:52/mi
1:55:08
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:17:08
↑ 66↓ 880.2%
30K· 18.64 mi
9:26/mi
2:46:27
↑ 181↓ 1480.2%
20M
9:33/mi
2:59:26
↑ 64↓ 500.2%
21M
10:20/mi
3:09:46
↑ 106↓ 241.6%
35K· 21.75 mi
9:12/mi
3:16:39
↑ 17↓ 861.7%
23M
9:34/mi
3:28:38
↑ 23↓ 630.6%
24M
9:01/mi
3:37:39
↓ 821.3%
40K· 24.85 mi
9:12/mi
3:45:31
↓ 200.3%
25.2M
9:54/mi
3:48:56
↑ 13↓ 160.2%
Finish· 26.22 mi
8:59/mi
3:58:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:08
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:02:57
Pace9:23 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:0226:548:3926:54
8:39
-
10K
6.21 mi11:50:5453:468:3926:52
8:39
0:00
15K
9.32 mi12:18:161:21:088:4227:22
8:49
+0:10
20K
12.43 mi12:46:131:49:058:4727:57
9:00
+0:11
Half
13.11 mi12:52:161:55:088:476:03
8:52
-0:08
25K
15.53 mi13:14:162:17:088:5022:00
9:04
+0:12
30K
18.64 mi13:43:352:46:278:5629:19
9:26
+0:22
20M
20.00 mi13:56:342:59:268:5812:59
9:33
+0:07
21M
21.00 mi14:06:543:09:469:0210:20
10:20
+0:47
35K
21.75 mi14:13:473:16:399:036:53
9:12
-1:08
23M
23.00 mi14:25:463:28:389:0411:59
9:34
+0:22
24M
24.00 mi14:34:473:37:399:049:01
9:01
-0:33
40K
24.85 mi14:42:393:45:319:047:52
9:12
+0:11
25.2M
25.20 mi14:46:043:48:569:053:25
9:54
+0:42
Finish
26.22 mi14:55:133:58:059:059:09
8:59
-0:55

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

8:39 /mi

Average Pace

9:05 /mi

Slowest Pace

10:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:19:22

84% of race

Time at Steady Pace

28:23

12% of race

Time at Slower Pace

10:20

4% of race

Average Pace: 9:05 /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 mi11:24:0226:548:3926:54
8:39
#18637
10K
6.21 mi11:50:5453:468:3926:52
8:39
#18824
15K
9.32 mi12:18:161:21:088:4227:22
8:49
#19076
20K
12.43 mi12:46:131:49:058:4727:57
9:00
#19216
Half
13.11 mi12:52:161:55:088:476:03
8:52
#19235
25K
15.53 mi13:14:162:17:088:5022:00
9:04
#19248
30K
18.64 mi13:43:352:46:278:5629:19
9:26
#19252
20M
20.00 mi13:56:342:59:268:5812:59
9:33
#19231
21M
21.00 mi14:06:543:09:469:0210:20
10:20
#19211
35K
21.75 mi14:13:473:16:399:036:53
9:12
#19211
23M
23.00 mi14:25:463:28:389:0411:59
9:34
#19173
24M
24.00 mi14:34:473:37:399:049:01
9:01
#19082
40K
24.85 mi14:42:393:45:319:047:52
9:12
#19014
25.2M
25.20 mi14:46:043:48:569:053:25
9:54
#18982
Finish
26.22 mi14:55:133:58:059:059:09
8:59
#18965
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi186376960696019575(Top 74%)7428(Top 65%)7428(Top 409%)
10K6.21 mi3.10 mi18824-1877025-657025-6519126(Top 72%)7159(Top 63%)7159(Top 394%)
15K9.32 mi3.11 mi19076-2527178-1537178-15319575(Top 74%)7428(Top 65%)7428(Top 409%)
20K12.43 mi3.11 mi19216-1407248-707248-7019689(Top 74%)7490(Top 66%)7490(Top 412%)
Half13.11 mi0.68 mi19235-197259-117259-1119855(Top 75%)7580(Top 66%)7580(Top 417%)
25K15.53 mi2.42 mi19248-137268-97268-919310(Top 73%)7312(Top 64%)7312(Top 402%)
30K18.64 mi3.11 mi19252-47287-197287-1919205(Top 72%)7306(Top 64%)7306(Top 402%)
20M20.00 mi1.36 mi19231+217286+17286+119071(Top 72%)7333(Top 64%)7333(Top 404%)
21M21.00 mi1.00 mi19211+207290-47290-419126(Top 72%)7412(Top 65%)7412(Top 408%)
35K21.75 mi0.75 mi192117297-77297-718765(Top 70%)7255(Top 64%)7255(Top 399%)
23M23.00 mi1.25 mi19173+387280+177280+1718625(Top 70%)7202(Top 63%)7202(Top 396%)
24M24.00 mi1.00 mi19082+917242+387242+3817343(Top 65%)6549(Top 57%)6549(Top 360%)
40K24.85 mi0.85 mi19014+687206+367206+3617123(Top 64%)6477(Top 57%)6477(Top 356%)
25.2M25.20 mi0.35 mi18982+327191+157191+1517087(Top 64%)6479(Top 57%)6479(Top 357%)
Finish26.22 mi1.02 mi18965+177194-37194-317909(Top 67%)6871(Top 60%)6871(Top 378%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

19575

Females

7428

F45-49

7428

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19126

Females

7159

F45-49

7159

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

19575

Females

7428

F45-49

7428

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19689

Females

7490

F45-49

7490

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

19855

Females

7580

F45-49

7580

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

19310

Females

7312

F45-49

7312

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

19205

Females

7306

F45-49

7306

30K→20M

18.6 - 20.0 mi

Top 72%
×5story building
+64ft-50ft

Overall

19071

Females

7333

F45-49

7333

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

19126

Females

7412

F45-49

7412

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18765

Females

7255

F45-49

7255

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

18625

Females

7202

F45-49

7202

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

17343

Females

6549

F45-49

6549

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17123

Females

6477

F45-49

6477

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

17087

Females

6479

F45-49

6479

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17909

Females

6871

F45-49

6871

Passing Analysis

Category:
Athletes Passed
1357
Passed By
1685
Net Change
-328
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18637
5K → 10K253440-187#18637#18824
10K → 15K96348-252#18824#19076
15K → 20K112252-140#19076#19216
20K → Half1635-19#19216#19235
Half → 25K116129-13#19235#19248
25K → 30K164168-4#19248#19252
30K → 20M8867+21#19252#19231
20M → 21M9575+20#19231#19211
21M → 35K38380#19211#19211
35K → 23M9355+38#19211#19173
23M → 24M10918+91#19173#19082
24M → 40K8113+68#19082#19014
40K → 25.2M4311+32#19014#18982
25.2M → Finish5336+17#18982#18965
TOTALS13571685-328
📊

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