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BOSTON MARATHON 2023

Natalie Williamson

Bib: 20348•F

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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 15%
Division (F45-49)
#0 / 1817
Top 15%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:51
Rank: #16292
Start → 5K
8:19/mi
25:51 split
10K· 6.21 mi
50:45
Rank: #15600 (+692)
5K → 10K
8:01/mi
24:54 split
15K· 9.32 mi
1:15:27
Rank: #15091 (+509)
10K → 15K
7:57/mi
24:42 split
20K· 12.43 mi
1:40:08
Rank: #14538 (+553)
15K → 20K
7:57/mi
24:41 split
Half· 13.11 mi
1:45:26
Rank: #14449 (+89)
20K → Half
7:46/mi
5:18 split
25K· 15.53 mi
2:04:27
Rank: #13951 (+498)
Half → 25K
7:51/mi
19:01 split
30K· 18.64 mi
2:29:47
Rank: #13559 (+392)
25K → 30K
8:09/mi
25:20 split
20M
2:40:32
Rank: #13253 (+306)
30K → 20M
7:55/mi
10:45 split
21M
2:48:49
Rank: #12971 (+282)
20M → 21M
8:17/mi
8:17 split
35K· 21.75 mi
2:54:39
Rank: #12874 (+97)
21M → 35K
7:48/mi
5:50 split
23M
3:04:36
Rank: #12636 (+238)
35K → 23M
7:57/mi
9:57 split
24M
3:12:20
Rank: #12475 (+161)
23M → 24M
7:44/mi
7:44 split
40K· 24.85 mi
3:19:03
Rank: #12348 (+127)
24M → 40K
7:51/mi
6:43 split
25.2M
3:21:53
Rank: #12273 (+75)
40K → 25.2M
8:13/mi
2:50 split
Finish· 26.22 mi
3:29:28
Rank: #12089 (+184)
25.2M → Finish
7:26/mi
7:35 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:45:26
Pace8:03 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:44:02
Pace7:56 /mi
📊Negative Split: 1.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4325:518:1925:51
8:19
-
10K
6.21 mi11:43:3750:458:1024:54
8:01
-0:18
15K
9.32 mi12:08:191:15:278:0624:42
7:57
-0:04
20K
12.43 mi12:33:001:40:088:0324:41
7:57
0:00
Half
13.11 mi12:38:181:45:268:035:18
7:46
-0:11
25K
15.53 mi12:57:192:04:278:0119:01
7:51
+0:05
30K
18.64 mi13:22:392:29:478:0225:20
8:09
+0:18
20M
20.00 mi13:33:242:40:328:0210:45
7:55
-0:14
21M
21.00 mi13:41:412:48:498:028:17
8:17
+0:22
35K
21.75 mi13:47:312:54:398:025:50
7:48
-0:29
23M
23.00 mi13:57:283:04:368:029:57
7:57
+0:09
24M
24.00 mi14:05:123:12:208:017:44
7:44
-0:13
40K
24.85 mi14:11:553:19:038:016:43
7:51
+0:07
25.2M
25.20 mi14:14:453:21:538:012:50
8:13
+0:22
Finish
26.22 mi14:22:203:29:288:007:35
7:26
-0:47

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

7:26 /mi

Average Pace

8:00 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:30

82% of race

Time at Steady Pace

36:58

18% of race

Time at Slower Pace

0:00

0% 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 mi11:18:4325:518:1925:51
8:19
#16292
10K
6.21 mi11:43:3750:458:1024:54
8:01
#15600
15K
9.32 mi12:08:191:15:278:0624:42
7:57
#15091
20K
12.43 mi12:33:001:40:088:0324:41
7:57
#14538
Half
13.11 mi12:38:181:45:268:035:18
7:46
#14449
25K
15.53 mi12:57:192:04:278:0119:01
7:51
#13951
30K
18.64 mi13:22:392:29:478:0225:20
8:09
#13559
20M
20.00 mi13:33:242:40:328:0210:45
7:55
#13253
21M
21.00 mi13:41:412:48:498:028:17
8:17
#12971
35K
21.75 mi13:47:312:54:398:025:50
7:48
#12874
23M
23.00 mi13:57:283:04:368:029:57
7:57
#12636
24M
24.00 mi14:05:123:12:208:017:44
7:44
#12475
40K
24.85 mi14:11:553:19:038:016:43
7:51
#12348
25.2M
25.20 mi14:14:453:21:538:012:50
8:13
#12273
Finish
26.22 mi14:22:203:29:288:007:35
7:26
#12089
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi162925459545913999(Top 53%)4082(Top 36%)4082(Top 225%)
10K6.21 mi3.10 mi15600+6925029+4305029+43014915(Top 56%)4616(Top 40%)4616(Top 254%)
15K9.32 mi3.11 mi15091+5094720+3094720+30913999(Top 53%)4082(Top 36%)4082(Top 225%)
20K12.43 mi3.11 mi14538+5534390+3304390+33012997(Top 49%)3547(Top 31%)3547(Top 195%)
Half13.11 mi0.68 mi14449+894347+434347+4312499(Top 47%)3202(Top 28%)3202(Top 176%)
25K15.53 mi2.42 mi13951+4984082+2654082+26511478(Top 43%)2760(Top 24%)2760(Top 152%)
30K18.64 mi3.11 mi13559+3923876+2063876+20612034(Top 45%)3202(Top 28%)3202(Top 176%)
20M20.00 mi1.36 mi13253+3063708+1683708+1689673(Top 36%)2108(Top 18%)2108(Top 116%)
21M21.00 mi1.00 mi12971+2823571+1373571+1379179(Top 34%)2011(Top 18%)2011(Top 111%)
35K21.75 mi0.75 mi12874+973530+413530+4110696(Top 40%)2730(Top 24%)2730(Top 150%)
23M23.00 mi1.25 mi12636+2383410+1203410+1209431(Top 35%)2240(Top 20%)2240(Top 123%)
24M24.00 mi1.00 mi12475+1613335+753335+759345(Top 35%)2275(Top 20%)2275(Top 125%)
40K24.85 mi0.85 mi12348+1273284+513284+519096(Top 34%)2228(Top 20%)2228(Top 123%)
25.2M25.20 mi0.35 mi12273+753258+263258+267894(Top 30%)1806(Top 16%)1806(Top 99%)
Finish26.22 mi1.02 mi12089+1843175+833175+838149(Top 31%)1913(Top 17%)1913(Top 105%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

13999

Females

4082

F45-49

4082

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

14915

Females

4616

F45-49

4616

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

13999

Females

4082

F45-49

4082

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

12997

Females

3547

F45-49

3547

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

12499

Females

3202

F45-49

3202

Half→25K

13.1 - 15.5 mi

Top 43%
×4story building
+66ft-88ft

Overall

11478

Females

2760

F45-49

2760

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

12034

Females

3202

F45-49

3202

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

9673

Females

2108

F45-49

2108

20M→21M

20.0 - 21.0 mi

Top 34%
×8story building
+106ft-24ft

Overall

9179

Females

2011

F45-49

2011

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

10696

Females

2730

F45-49

2730

35K→23M

21.8 - 23.0 mi

Top 35%
×5story building
+23ft-63ft

Overall

9431

Females

2240

F45-49

2240

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9345

Females

2275

F45-49

2275

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9096

Females

2228

F45-49

2228

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

7894

Females

1806

F45-49

1806

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8149

Females

1913

F45-49

1913

Passing Analysis

Category:
Athletes Passed
4429
Passed By
226
Net Change
+4203
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16292
5K → 10K77886+692#16292#15600
10K → 15K54233+509#15600#15091
15K → 20K57017+553#15091#14538
20K → Half956+89#14538#14449
Half → 25K5013+498#14449#13951
25K → 30K41725+392#13951#13559
30K → 20M3093+306#13559#13253
20M → 21M2897+282#13253#12971
21M → 35K1058+97#12971#12874
35K → 23M2435+238#12874#12636
23M → 24M17211+161#12636#12475
24M → 40K13811+127#12475#12348
40K → 25.2M783+75#12348#12273
25.2M → Finish1928+184#12273#12089
TOTALS4429226+4203
📊

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