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BOSTON MARATHON 2023

Sydney Rees

Bib: 27511•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
9:53/mi
30:41
↑ 97↓ 3451.5%
10K· 6.21 mi
9:26/mi
59:58
↑ 79↓ 1380.4%
15K· 9.32 mi
9:07/mi
1:28:16
↑ 67↓ 78
20K· 12.43 mi
9:10/mi
1:56:44
↑ 106↓ 860.1%
Half· 13.11 mi
9:14/mi
2:03:02
↑ 19↓ 370.5%
25K· 15.53 mi
9:22/mi
2:25:44
↑ 66↓ 880.2%
30K· 18.64 mi
9:26/mi
2:55:02
↑ 181↓ 1480.2%
20M
9:18/mi
3:07:40
↑ 64↓ 500.2%
21M
9:31/mi
3:17:11
↑ 106↓ 241.6%
35K· 21.75 mi
8:53/mi
3:23:50
↑ 17↓ 861.7%
23M
9:09/mi
3:35:17
↑ 23↓ 630.6%
24M
9:04/mi
3:44:21
↓ 821.3%
40K· 24.85 mi
9:02/mi
3:52:04
↓ 200.3%
25.2M
9:43/mi
3:55:25
↑ 13↓ 160.2%
Finish· 26.22 mi
8:36/mi
4:04:11
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:03:02
Pace9:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:01:09
Pace9:15 /mi
📊Negative Split: 1.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:1430:419:5330:41
9:53
-
10K
6.21 mi12:21:3159:589:3929:17
9:26
-0:27
15K
9.32 mi12:49:491:28:169:2828:18
9:07
-0:19
20K
12.43 mi13:18:171:56:449:2428:28
9:10
+0:03
Half
13.11 mi13:24:352:03:029:236:18
9:14
+0:04
25K
15.53 mi13:47:172:25:449:2322:42
9:22
+0:08
30K
18.64 mi14:16:352:55:029:2329:18
9:26
+0:04
20M
20.00 mi14:29:133:07:409:2312:38
9:18
-0:08
21M
21.00 mi14:38:443:17:119:239:31
9:31
+0:13
35K
21.75 mi14:45:233:23:509:226:39
8:53
-0:38
23M
23.00 mi14:56:503:35:179:2211:27
9:09
+0:16
24M
24.00 mi15:05:543:44:219:219:04
9:04
-0:05
40K
24.85 mi15:13:373:52:049:207:43
9:02
-0:02
25.2M
25.20 mi15:16:583:55:259:213:21
9:43
+0:41
Finish
26.22 mi15:25:444:04:119:198:46
8:36
-1:07

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

8:36 /mi

Average Pace

9:19 /mi

Slowest Pace

9:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:20:38

82% of race

Time at Steady Pace

43:33

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:19 /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 mi11:52:1430:419:5330:41
9:53
#23139
10K
6.21 mi12:21:3159:589:3929:17
9:26
#22757
15K
9.32 mi12:49:491:28:169:2828:18
9:07
#22208
20K
12.43 mi13:18:171:56:449:2428:28
9:10
#21785
Half
13.11 mi13:24:352:03:029:236:18
9:14
#21761
25K
15.53 mi13:47:172:25:449:2322:42
9:22
#21544
30K
18.64 mi14:16:352:55:029:2329:18
9:26
#21155
20M
20.00 mi14:29:133:07:409:2312:38
9:18
#20900
21M
21.00 mi14:38:443:17:119:239:31
9:31
#20644
35K
21.75 mi14:45:233:23:509:226:39
8:53
#20538
23M
23.00 mi14:56:503:35:179:2211:27
9:09
#20329
24M
24.00 mi15:05:543:44:219:219:04
9:04
#20237
40K
24.85 mi15:13:373:52:049:207:43
9:02
#20103
25.2M
25.20 mi15:16:583:55:259:213:21
9:43
#20053
Finish
26.22 mi15:25:444:04:119:198:46
8:36
#19929
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi231399463946320978(Top 79%)8221(Top 72%)8221(Top 168%)
10K6.21 mi3.10 mi22757+3829228+2359228+23522289(Top 84%)8973(Top 79%)8973(Top 184%)
15K9.32 mi3.11 mi22208+5498938+2908938+29020978(Top 79%)8221(Top 72%)8221(Top 168%)
20K12.43 mi3.11 mi21785+4238704+2348704+23420424(Top 77%)7917(Top 69%)7917(Top 162%)
Half13.11 mi0.68 mi21761+248689+158689+1521278(Top 80%)8389(Top 73%)8389(Top 172%)
25K15.53 mi2.42 mi21544+2178571+1188571+11820392(Top 77%)7920(Top 69%)7920(Top 162%)
30K18.64 mi3.11 mi21155+3898366+2058366+20519185(Top 72%)7299(Top 64%)7299(Top 149%)
20M20.00 mi1.36 mi20900+2558238+1288238+12818029(Top 68%)6762(Top 59%)6762(Top 138%)
21M21.00 mi1.00 mi20644+2568104+1348104+13416074(Top 60%)5681(Top 50%)5681(Top 116%)
35K21.75 mi0.75 mi20538+1068058+468058+4617443(Top 66%)6536(Top 57%)6536(Top 134%)
23M23.00 mi1.25 mi20329+2097954+1047954+10416807(Top 63%)6199(Top 54%)6199(Top 127%)
24M24.00 mi1.00 mi20237+927911+437911+4317566(Top 66%)6667(Top 58%)6667(Top 137%)
40K24.85 mi0.85 mi20103+1347845+667845+6616328(Top 61%)6053(Top 53%)6053(Top 124%)
25.2M25.20 mi0.35 mi20053+507822+237822+2316284(Top 61%)6051(Top 53%)6051(Top 124%)
Finish26.22 mi1.02 mi19929+1247750+727750+7216049(Top 60%)5850(Top 51%)5850(Top 120%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

20978

Females

8221

F18-39

8221

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22289

Females

8973

F18-39

8973

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

20978

Females

8221

F18-39

8221

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20424

Females

7917

F18-39

7917

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

21278

Females

8389

F18-39

8389

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20392

Females

7920

F18-39

7920

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

19185

Females

7299

F18-39

7299

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18029

Females

6762

F18-39

6762

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

16074

Females

5681

F18-39

5681

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

17443

Females

6536

F18-39

6536

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16807

Females

6199

F18-39

6199

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17566

Females

6667

F18-39

6667

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

16328

Females

6053

F18-39

6053

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16284

Females

6051

F18-39

6051

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

16049

Females

5850

F18-39

5850

Passing Analysis

Category:
Athletes Passed
3376
Passed By
166
Net Change
+3210
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23139
5K → 10K46684+382#23139#22757
10K → 15K56112+549#22757#22208
15K → 20K43714+423#22208#21785
20K → Half3612+24#21785#21761
Half → 25K22912+217#21761#21544
25K → 30K3978+389#21544#21155
30K → 20M2550+255#21155#20900
20M → 21M2582+256#20900#20644
21M → 35K1104+106#20644#20538
35K → 23M2112+209#20538#20329
23M → 24M975+92#20329#20237
24M → 40K1373+134#20237#20103
40K → 25.2M511+50#20103#20053
25.2M → Finish1317+124#20053#19929
TOTALS3376166+3210
📊

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