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BOSTON MARATHON 2023

Kelly Saffery

Bib: 25825•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
11:38/mi
36:09
↑ 97↓ 3451.5%
10K· 6.21 mi
11:07/mi
1:10:41
↑ 79↓ 1380.4%
15K· 9.32 mi
11:00/mi
1:44:52
↑ 67↓ 78
20K· 12.43 mi
11:05/mi
2:19:18
↑ 106↓ 860.1%
Half· 13.11 mi
10:36/mi
2:26:32
↑ 19↓ 370.5%
25K· 15.53 mi
10:59/mi
2:53:11
↑ 66↓ 880.2%
30K· 18.64 mi
11:27/mi
3:28:44
↑ 181↓ 1480.2%
20M
11:23/mi
3:44:12
↑ 64↓ 500.2%
21M
12:00/mi
3:56:12
↑ 106↓ 241.6%
35K· 21.75 mi
11:39/mi
4:04:55
↑ 17↓ 861.7%
23M
11:31/mi
4:19:20
↑ 23↓ 630.6%
24M
11:11/mi
4:30:31
↓ 821.3%
40K· 24.85 mi
11:15/mi
4:40:08
↓ 200.3%
25.2M
11:16/mi
4:44:01
↑ 13↓ 160.2%
Finish· 26.22 mi
10:00/mi
4:54:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time2:26:32
Pace11:11 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time2:27:40
Pace11:16 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:0636:0911:3836:09
11:38
-
10K
6.21 mi12:26:381:10:4111:2334:32
11:07
-0:31
15K
9.32 mi13:00:491:44:5211:1534:11
11:00
-0:07
20K
12.43 mi13:35:152:19:1811:1334:26
11:05
+0:05
Half
13.11 mi13:42:292:26:3211:117:14
10:36
-0:29
25K
15.53 mi14:09:082:53:1111:0926:39
10:59
+0:23
30K
18.64 mi14:44:413:28:4411:1235:33
11:27
+0:28
20M
20.00 mi15:00:093:44:1211:1315:28
11:23
-0:04
21M
21.00 mi15:12:093:56:1211:1512:00
12:00
+0:37
35K
21.75 mi15:20:524:04:5511:168:43
11:39
-0:21
23M
23.00 mi15:35:174:19:2011:1714:25
11:31
-0:08
24M
24.00 mi15:46:284:30:3111:1611:11
11:11
-0:20
40K
24.85 mi15:56:054:40:0811:169:37
11:15
+0:04
25.2M
25.20 mi15:59:584:44:0111:163:53
11:16
+0:01
Finish
26.22 mi16:10:094:54:1211:1410:11
10:00
-1:16

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

10:00 /mi

Average Pace

11:14 /mi

Slowest Pace

12:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:15

27% of race

Time at Steady Pace

2:24:40

49% of race

Time at Slower Pace

1:11:17

24% of race

Average Pace: 11:13 /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 mi11:52:0636:0911:3836:09
11:38
#26292
10K
6.21 mi12:26:381:10:4111:2334:32
11:07
#25993
15K
9.32 mi13:00:491:44:5211:1534:11
11:00
#25744
20K
12.43 mi13:35:152:19:1811:1334:26
11:05
#25484
Half
13.11 mi13:42:292:26:3211:117:14
10:36
#25437
25K
15.53 mi14:09:082:53:1111:0926:39
10:59
#25206
30K
18.64 mi14:44:413:28:4411:1235:33
11:27
#24964
20M
20.00 mi15:00:093:44:1211:1315:28
11:23
#24847
21M
21.00 mi15:12:093:56:1211:1512:00
12:00
#24764
35K
21.75 mi15:20:524:04:5511:168:43
11:39
#24741
23M
23.00 mi15:35:174:19:2011:1714:25
11:31
#24664
24M
24.00 mi15:46:284:30:3111:1611:11
11:11
#24615
40K
24.85 mi15:56:054:40:0811:169:37
11:15
#24565
25.2M
25.20 mi15:59:584:44:0111:163:53
11:16
#24527
Finish
26.22 mi16:10:094:54:1211:1410:11
10:00
#24449
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26292112251122525171(Top 95%)10553(Top 92%)10553(Top 216%)
10K6.21 mi3.10 mi25993+29911038+18711038+18725586(Top 96%)10787(Top 94%)10787(Top 221%)
15K9.32 mi3.11 mi25744+24910878+16010878+16025171(Top 95%)10553(Top 92%)10553(Top 216%)
20K12.43 mi3.11 mi25484+26010738+14010738+14024734(Top 93%)10327(Top 90%)10327(Top 211%)
Half13.11 mi0.68 mi25437+4710710+2810710+2824386(Top 92%)10147(Top 89%)10147(Top 208%)
25K15.53 mi2.42 mi25206+23110588+12210588+12223968(Top 90%)9940(Top 87%)9940(Top 204%)
30K18.64 mi3.11 mi24964+24210463+12510463+12523784(Top 89%)9890(Top 87%)9890(Top 202%)
20M20.00 mi1.36 mi24847+11710413+5010413+5023338(Top 88%)9703(Top 85%)9703(Top 199%)
21M21.00 mi1.00 mi24764+8310367+4610367+4622768(Top 86%)9426(Top 83%)9426(Top 193%)
35K21.75 mi0.75 mi24741+2310358+910358+924295(Top 91%)10284(Top 90%)10284(Top 211%)
23M23.00 mi1.25 mi24664+7710325+3310325+3323275(Top 87%)9739(Top 85%)9739(Top 199%)
24M24.00 mi1.00 mi24615+4910305+2010305+2023391(Top 88%)9846(Top 86%)9846(Top 202%)
40K24.85 mi0.85 mi24565+5010290+1510290+1522828(Top 86%)9577(Top 84%)9577(Top 196%)
25.2M25.20 mi0.35 mi24527+3810267+2310267+2321092(Top 79%)8651(Top 76%)8651(Top 177%)
Finish26.22 mi1.02 mi24449+7810232+3510232+3521765(Top 82%)8998(Top 79%)8998(Top 184%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21story building
+97ft-345ft

Overall

25171

Females

10553

F18-39

10553

5K→10K

3.1 - 6.2 mi

Top 96%
×5story building
+79ft-138ft

Overall

25586

Females

10787

F18-39

10787

10K→15K

6.2 - 9.3 mi

Top 95%
×3story building
+67ft-78ft

Overall

25171

Females

10553

F18-39

10553

15K→20K

9.3 - 12.4 mi

Top 93%
×5story building
+106ft-86ft

Overall

24734

Females

10327

F18-39

10327

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

24386

Females

10147

F18-39

10147

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

23968

Females

9940

F18-39

9940

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

23784

Females

9890

F18-39

9890

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

23338

Females

9703

F18-39

9703

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22768

Females

9426

F18-39

9426

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

24295

Females

10284

F18-39

10284

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23275

Females

9739

F18-39

9739

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

23391

Females

9846

F18-39

9846

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

22828

Females

9577

F18-39

9577

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

21092

Females

8651

F18-39

8651

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

21765

Females

8998

F18-39

8998

Passing Analysis

Category:
Athletes Passed
1904
Passed By
61
Net Change
+1843
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26292
5K → 10K3045+299#26292#25993
10K → 15K2578+249#25993#25744
15K → 20K2633+260#25744#25484
20K → Half470+47#25484#25437
Half → 25K2332+231#25437#25206
25K → 30K2442+242#25206#24964
30K → 20M1203+117#24964#24847
20M → 21M874+83#24847#24764
21M → 35K329+23#24764#24741
35K → 23M847+77#24741#24664
23M → 24M567+49#24664#24615
24M → 40K599+50#24615#24565
40K → 25.2M380+38#24565#24527
25.2M → Finish802+78#24527#24449
TOTALS190461+1843
📊

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