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BOSTON MARATHON 2023

Zhihong Velmer

Bib: 21218•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 45%
Gender (Female)
#0 / 11423
Top 28%
Masters (Masters Women)
#0 / 6539
Top 14%
Division (F55-59)
#0 / 815
Top 5%
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
7:49/mi
24:16
↑ 97↓ 3451.5%
10K· 6.21 mi
7:32/mi
47:39
↑ 79↓ 1380.4%
15K· 9.32 mi
7:36/mi
1:11:16
↑ 67↓ 78
20K· 12.43 mi
7:52/mi
1:35:43
↑ 106↓ 860.1%
Half· 13.11 mi
7:53/mi
1:41:06
↑ 19↓ 370.5%
25K· 15.53 mi
7:55/mi
2:00:17
↑ 66↓ 880.2%
30K· 18.64 mi
8:13/mi
2:25:49
↑ 181↓ 1480.2%
20M
8:28/mi
2:37:20
↑ 64↓ 500.2%
21M
9:08/mi
2:46:28
↑ 106↓ 241.6%
35K· 21.75 mi
7:53/mi
2:52:22
↑ 17↓ 861.7%
23M
8:21/mi
3:02:49
↑ 23↓ 630.6%
24M
8:10/mi
3:10:59
↓ 821.3%
40K· 24.85 mi
8:16/mi
3:18:03
↓ 200.3%
25.2M
8:54/mi
3:21:07
↑ 13↓ 160.2%
Finish· 26.22 mi
8:04/mi
3:29:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:06
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:48:14
Pace8:15 /mi
📊Positive Split: 7.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3224:167:4924:16
7:49
-
10K
6.21 mi11:40:5547:397:4023:23
7:32
-0:17
15K
9.32 mi12:04:321:11:167:3923:37
7:36
+0:04
20K
12.43 mi12:28:591:35:437:4224:27
7:52
+0:16
Half
13.11 mi12:34:221:41:067:435:23
7:53
+0:01
25K
15.53 mi12:53:332:00:177:4519:11
7:55
+0:02
30K
18.64 mi13:19:052:25:497:4925:32
8:13
+0:18
20M
20.00 mi13:30:362:37:207:5211:31
8:28
+0:15
21M
21.00 mi13:39:442:46:287:569:08
9:08
+0:40
35K
21.75 mi13:45:382:52:227:565:54
7:53
-1:15
23M
23.00 mi13:56:053:02:497:5710:27
8:21
+0:28
24M
24.00 mi14:04:153:10:597:578:10
8:10
-0:11
40K
24.85 mi14:11:193:18:037:587:04
8:16
+0:06
25.2M
25.20 mi14:14:233:21:077:593:04
8:54
+0:38
Finish
26.22 mi14:22:363:29:207:598:13
8:04
-0:50

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

7:32 /mi

Average Pace

7:59 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:11:16

34% of race

Time at Steady Pace

1:43:54

50% of race

Time at Slower Pace

34:10

16% of race

Average Pace: 7:59 /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 mi11:17:3224:167:4924:16
7:49
#12467
10K
6.21 mi11:40:5547:397:4023:23
7:32
#11516
15K
9.32 mi12:04:321:11:167:3923:37
7:36
#11334
20K
12.43 mi12:28:591:35:437:4224:27
7:52
#11553
Half
13.11 mi12:34:221:41:067:435:23
7:53
#11635
25K
15.53 mi12:53:332:00:177:4519:11
7:55
#11665
30K
18.64 mi13:19:052:25:497:4925:32
8:13
#11801
20M
20.00 mi13:30:362:37:207:5211:31
8:28
#11938
21M
21.00 mi13:39:442:46:287:569:08
9:08
#12079
35K
21.75 mi13:45:382:52:227:565:54
7:53
#12034
23M
23.00 mi13:56:053:02:497:5710:27
8:21
#12041
24M
24.00 mi14:04:153:10:597:578:10
8:10
#12057
40K
24.85 mi14:11:193:18:037:587:04
8:16
#12042
25.2M
25.20 mi14:14:233:21:077:593:04
8:54
#12032
Finish
26.22 mi14:22:363:29:207:598:13
8:04
#12056
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi124673138313811055(Top 42%)2384(Top 21%)2384(Top 293%)
10K6.21 mi3.10 mi11516+9512614+5242614+52410688(Top 40%)2152(Top 19%)2152(Top 264%)
15K9.32 mi3.11 mi11334+1822508+1062508+10611055(Top 42%)2384(Top 21%)2384(Top 293%)
20K12.43 mi3.11 mi11553-2192657-1492657-14912353(Top 46%)3169(Top 28%)3169(Top 389%)
Half13.11 mi0.68 mi11635-822704-472704-4713521(Top 51%)3797(Top 33%)3797(Top 466%)
25K15.53 mi2.42 mi11665-302736-322736-3212026(Top 45%)3090(Top 27%)3090(Top 379%)
30K18.64 mi3.11 mi11801-1362866-1302866-13012470(Top 47%)3445(Top 30%)3445(Top 423%)
20M20.00 mi1.36 mi11938-1372959-932959-9313485(Top 51%)4114(Top 36%)4114(Top 505%)
21M21.00 mi1.00 mi12079-1413054-953054-9514127(Top 53%)4547(Top 40%)4547(Top 558%)
35K21.75 mi0.75 mi12034+453048+63048+611337(Top 43%)3044(Top 27%)3044(Top 373%)
23M23.00 mi1.25 mi12041-73080-323080-3212231(Top 46%)3642(Top 32%)3642(Top 447%)
24M24.00 mi1.00 mi12057-163111-313111-3112398(Top 47%)3795(Top 33%)3795(Top 466%)
40K24.85 mi0.85 mi12042+153127-163127-1611815(Top 44%)3562(Top 31%)3562(Top 437%)
25.2M25.20 mi0.35 mi12032+103121+63121+611954(Top 45%)3692(Top 32%)3692(Top 453%)
Finish26.22 mi1.02 mi12056-243158-373158-3712572(Top 47%)3989(Top 35%)3989(Top 489%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11055

Females

2384

F55-59

2384

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

10688

Females

2152

F55-59

2152

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11055

Females

2384

F55-59

2384

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

12353

Females

3169

F55-59

3169

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13521

Females

3797

F55-59

3797

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12026

Females

3090

F55-59

3090

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

12470

Females

3445

F55-59

3445

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

13485

Females

4114

F55-59

4114

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

14127

Females

4547

F55-59

4547

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11337

Females

3044

F55-59

3044

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

12231

Females

3642

F55-59

3642

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12398

Females

3795

F55-59

3795

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11815

Females

3562

F55-59

3562

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

11954

Females

3692

F55-59

3692

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

12572

Females

3989

F55-59

3989

Passing Analysis

Category:
Athletes Passed
2166
Passed By
1755
Net Change
+411
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12467
5K → 10K100655+951#12467#11516
10K → 15K289107+182#11516#11334
15K → 20K92311-219#11334#11553
20K → Half1092-82#11553#11635
Half → 25K136166-30#11635#11665
25K → 30K136272-136#11665#11801
30K → 20M59196-137#11801#11938
20M → 21M51192-141#11938#12079
21M → 35K6924+45#12079#12034
35K → 23M8592-7#12034#12041
23M → 24M6581-16#12041#12057
24M → 40K6954+15#12057#12042
40K → 25.2M3626+10#12042#12032
25.2M → Finish6387-24#12032#12056
TOTALS21661755+411
📊

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