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BOSTON MARATHON 2023

Shurfen Ning

Bib: 23378 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 38%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:31/mi
26:29
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:30/mi
52:54
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:43/mi
1:19:58
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:58/mi
1:47:49
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:58/mi
1:53:56
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:16/mi
2:16:23
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:43/mi
2:46:33
↑ 181↓ 1480.2%
138 ft elev
20M
9:27/mi
2:59:23
↑ 64↓ 500.2%
148 ft elev
21M
10:12/mi
3:09:35
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:53/mi
3:16:14
↑ 17↓ 861.7%
156 ft elev
23M
9:17/mi
3:27:52
↑ 23↓ 630.6%
116 ft elev
24M
9:06/mi
3:36:58
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:16/mi
3:44:53
↓ 200.3%
20 ft elev
25.2M
9:57/mi
3:48:19
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:59/mi
3:57:28
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:56
Pace8:41 /mi
2nd Half
Distance13.11 mi
Time2:03:32
Pace9:25 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:3826:298:3126:29
8:31
-
10K
6.21 mi11:48:0352:548:3126:25
8:30
-0:01
15K
9.32 mi12:15:071:19:588:3527:04
8:43
+0:13
20K
12.43 mi12:42:581:47:498:4127:51
8:58
+0:15
Half
13.11 mi12:49:051:53:568:416:07
8:58
0:00
25K
15.53 mi13:11:322:16:238:4722:27
9:16
+0:18
30K
18.64 mi13:41:422:46:338:5630:10
9:43
+0:27
20M
20.00 mi13:54:322:59:238:5812:50
9:27
-0:16
21M
21.00 mi14:04:443:09:359:0210:12
10:12
+0:45
35K
21.75 mi14:11:233:16:149:016:39
8:53
-1:19
23M
23.00 mi14:23:013:27:529:0211:38
9:17
+0:24
24M
24.00 mi14:32:073:36:589:029:06
9:06
-0:11
40K
24.85 mi14:40:023:44:539:037:55
9:16
+0:10
25.2M
25.20 mi14:43:283:48:199:043:26
9:57
+0:41
Finish
26.22 mi14:52:373:57:289:049:09
8:59
-0:58

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

8:30 /mi

Average Pace

9:04 /mi

Slowest Pace

10:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:50

76% of race

Time at Steady Pace

46:26

20% of race

Time at Slower Pace

10:12

4% of race

Average Pace: 9:03 /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 mi11:21:3826:298:3126:29
8:31
#17728
10K
6.21 mi11:48:0352:548:3126:25
8:30
#17989
15K
9.32 mi12:15:071:19:588:3527:04
8:43
#18366
20K
12.43 mi12:42:581:47:498:4127:51
8:58
#18680
Half
13.11 mi12:49:051:53:568:416:07
8:58
#18751
25K
15.53 mi13:11:322:16:238:4722:27
9:16
#18996
30K
18.64 mi13:41:422:46:338:5630:10
9:43
#19279
20M
20.00 mi13:54:322:59:238:5812:50
9:27
#19222
21M
21.00 mi14:04:443:09:359:0210:12
10:12
#19180
35K
21.75 mi14:11:233:16:149:016:39
8:53
#19120
23M
23.00 mi14:23:013:27:529:0211:38
9:17
#19022
24M
24.00 mi14:32:073:36:589:029:06
9:06
#18961
40K
24.85 mi14:40:023:44:539:037:55
9:16
#18893
25.2M
25.20 mi14:43:283:48:199:043:26
9:57
#18863
Finish
26.22 mi14:52:373:57:289:049:09
8:59
#18858
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi177286391639119058(Top 72%)7141(Top 63%)7141(Top 876%)
10K6.21 mi3.10 mi17989-2616529-1386529-13818283(Top 69%)6650(Top 58%)6650(Top 816%)
15K9.32 mi3.11 mi18366-3776729-2006729-20019058(Top 72%)7141(Top 63%)7141(Top 876%)
20K12.43 mi3.11 mi18680-3146920-1916920-19119536(Top 73%)7400(Top 65%)7400(Top 908%)
Half13.11 mi0.68 mi18751-716968-486968-4820309(Top 76%)7844(Top 69%)7844(Top 962%)
25K15.53 mi2.42 mi18996-2457120-1527120-15220057(Top 75%)7725(Top 68%)7725(Top 948%)
30K18.64 mi3.11 mi19279-2837301-1817301-18120173(Top 76%)7870(Top 69%)7870(Top 966%)
20M20.00 mi1.36 mi19222+577280+217280+2118653(Top 70%)7111(Top 62%)7111(Top 873%)
21M21.00 mi1.00 mi19180+427271+97271+918731(Top 70%)7186(Top 63%)7186(Top 882%)
35K21.75 mi0.75 mi19120+607242+297242+2917432(Top 65%)6525(Top 57%)6525(Top 801%)
23M23.00 mi1.25 mi19022+987195+477195+4717506(Top 66%)6578(Top 58%)6578(Top 807%)
24M24.00 mi1.00 mi18961+617176+197176+1917693(Top 66%)6744(Top 59%)6744(Top 827%)
40K24.85 mi0.85 mi18893+687139+377139+3717374(Top 65%)6617(Top 58%)6617(Top 812%)
25.2M25.20 mi0.35 mi18863+307131+87131+817259(Top 65%)6585(Top 58%)6585(Top 808%)
Finish26.22 mi1.02 mi18858+57128+37128+317908(Top 67%)6870(Top 60%)6870(Top 843%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

19058

Females

7141

F55-59

7141

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

18283

Females

6650

F55-59

6650

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

19058

Females

7141

F55-59

7141

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

19536

Females

7400

F55-59

7400

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

20309

Females

7844

F55-59

7844

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

20057

Females

7725

F55-59

7725

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

20173

Females

7870

F55-59

7870

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

18653

Females

7111

F55-59

7111

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18731

Females

7186

F55-59

7186

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

17432

Females

6525

F55-59

6525

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

17506

Females

6578

F55-59

6578

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17693

Females

6744

F55-59

6744

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17374

Females

6617

F55-59

6617

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17259

Females

6585

F55-59

6585

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17908

Females

6870

F55-59

6870

Passing Analysis

Category:
Athletes Passed
1173
Passed By
2303
Net Change
-1130
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17728
5K → 10K197458-261#17728#17989
10K → 15K78455-377#17989#18366
15K → 20K76390-314#18366#18680
20K → Half1182-71#18680#18751
Half → 25K65310-245#18751#18996
25K → 30K86369-283#18996#19279
30K → 20M9841+57#19279#19222
20M → 21M10462+42#19222#19180
21M → 35K677+60#19180#19120
35K → 23M13133+98#19120#19022
23M → 24M8423+61#19022#18961
24M → 40K9123+68#18961#18893
40K → 25.2M4010+30#18893#18863
25.2M → Finish4540+5#18863#18858
TOTALS11732303-1130
📊

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