Boston Marathon logo
BOSTON MARATHON 2023

Siobhan Birge

FL

Bib: 24584 F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
10:08/mi
31:30
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
10:46/mi
1:04:58
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
10:48/mi
1:38:31
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
11:20/mi
2:13:45
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
10:33/mi
2:20:57
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
10:32/mi
2:46:30
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
12:03/mi
3:23:56
↑ 181↓ 1480.2%
138 ft elev
20M
12:38/mi
3:41:06
↑ 64↓ 500.2%
148 ft elev
21M
12:27/mi
3:53:33
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
12:15/mi
4:02:43
↑ 17↓ 861.7%
156 ft elev
23M
14:56/mi
4:21:25
↑ 23↓ 630.6%
116 ft elev
24M
11:05/mi
4:32:30
↓ 821.3%
34 ft elev
40K· 24.85 mi
13:32/mi
4:44:04
↓ 200.3%
20 ft elev
25.2M
12:28/mi
4:48:22
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
11:24/mi
4:59:59
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Is this your race?

Claim it for a free AI report

A coach's-eye read of your race — emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:20:57
Pace10:45 /mi
2nd Half
Distance13.11 mi
Time2:39:02
Pace12:08 /mi
📊Positive Split: 12.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:4331:3010:0831:30
10:08
-
10K
6.21 mi12:20:111:04:5810:2733:28
10:46
+0:38
15K
9.32 mi12:53:441:38:3110:3433:33
10:48
+0:02
20K
12.43 mi13:28:582:13:4510:4635:14
11:20
+0:32
Half
13.11 mi13:36:102:20:5710:457:12
10:33
-0:47
25K
15.53 mi14:01:432:46:3010:4325:33
10:32
-0:01
30K
18.64 mi14:39:093:23:5610:5637:26
12:03
+1:31
20M
20.00 mi14:56:193:41:0611:0317:10
12:38
+0:35
21M
21.00 mi15:08:463:53:3311:0712:27
12:27
-0:11
35K
21.75 mi15:17:564:02:4311:109:10
12:15
-0:12
23M
23.00 mi15:36:384:21:2511:2218:42
14:56
+2:41
24M
24.00 mi15:47:434:32:3011:2111:05
11:05
-3:51
40K
24.85 mi15:59:174:44:0411:2611:34
13:32
+2:27
25.2M
25.20 mi16:03:354:48:2211:274:18
12:28
-1:04
Finish
26.22 mi16:15:124:59:5911:2711:37
11:24
-1:04

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

10:08 /mi

Average Pace

11:27 /mi

Slowest Pace

14:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:37:43

33% of race

Time at Steady Pace

1:31:29

30% of race

Time at Slower Pace

1:50:47

37% of race

Average Pace: 11:26 /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 mi11:46:4331:3010:0831:30
10:08
#23788
10K
6.21 mi12:20:111:04:5810:2733:28
10:46
#24625
15K
9.32 mi12:53:441:38:3110:3433:33
10:48
#24761
20K
12.43 mi13:28:582:13:4510:4635:14
11:20
#24867
Half
13.11 mi13:36:102:20:5710:457:12
10:33
#24837
25K
15.53 mi14:01:432:46:3010:4325:33
10:32
#24594
30K
18.64 mi14:39:093:23:5610:5637:26
12:03
#24574
20M
20.00 mi14:56:193:41:0611:0317:10
12:38
#24613
21M
21.00 mi15:08:463:53:3311:0712:27
12:27
#24561
35K
21.75 mi15:17:564:02:4311:109:10
12:15
#24595
23M
23.00 mi15:36:384:21:2511:2218:42
14:56
#24805
24M
24.00 mi15:47:434:32:3011:2111:05
11:05
#24750
40K
24.85 mi15:59:174:44:0411:2611:34
13:32
#24807
25.2M
25.20 mi16:03:354:48:2211:274:18
12:28
#24805
Finish
26.22 mi16:15:124:59:5911:2711:37
11:24
#24817
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi237889787978724937(Top 94%)10426(Top 91%)10426(Top 213%)
10K6.21 mi3.10 mi24625-83710224-43710224-43725129(Top 94%)10512(Top 92%)10512(Top 215%)
15K9.32 mi3.11 mi24761-13610317-9310317-9324937(Top 94%)10426(Top 91%)10426(Top 213%)
20K12.43 mi3.11 mi24867-10610379-6210379-6225048(Top 94%)10510(Top 92%)10510(Top 215%)
Half13.11 mi0.68 mi24837+3010364+1510364+1524319(Top 91%)10112(Top 89%)10112(Top 207%)
25K15.53 mi2.42 mi24594+24310242+12210242+12223261(Top 87%)9533(Top 83%)9533(Top 195%)
30K18.64 mi3.11 mi24574+2010244-210244-224562(Top 92%)10315(Top 90%)10315(Top 211%)
20M20.00 mi1.36 mi24613-3910277-3310277-3324860(Top 93%)10527(Top 92%)10527(Top 216%)
21M21.00 mi1.00 mi24561+5210249+2810249+2823405(Top 88%)9766(Top 85%)9766(Top 200%)
35K21.75 mi0.75 mi24595-3410279-3010279-3024936(Top 94%)10624(Top 93%)10624(Top 218%)
23M23.00 mi1.25 mi24805-21010410-13110410-13126269(Top 99%)11268(Top 99%)11268(Top 231%)
24M24.00 mi1.00 mi24750+5510385+2510385+2523211(Top 87%)9750(Top 85%)9750(Top 200%)
40K24.85 mi0.85 mi24807-5710422-3710422-3725374(Top 95%)10856(Top 95%)10856(Top 222%)
25.2M25.20 mi0.35 mi24805+210426-410426-423269(Top 87%)9815(Top 86%)9815(Top 201%)
Finish26.22 mi1.02 mi24817-1210441-1510441-1524565(Top 92%)10441(Top 91%)10441(Top 214%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21story building
+97ft-345ft

Overall

24937

Females

10426

F18-39

10426

5K→10K

3.1 - 6.2 mi

Top 94%
×5story building
+79ft-138ft

Overall

25129

Females

10512

F18-39

10512

10K→15K

6.2 - 9.3 mi

Top 94%
×3story building
+67ft-78ft

Overall

24937

Females

10426

F18-39

10426

15K→20K

9.3 - 12.4 mi

Top 94%
×5story building
+106ft-86ft

Overall

25048

Females

10510

F18-39

10510

20K→Half

12.4 - 13.1 mi

Top 91%
×2story building
+19ft-37ft

Overall

24319

Females

10112

F18-39

10112

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

23261

Females

9533

F18-39

9533

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

24562

Females

10315

F18-39

10315

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

24860

Females

10527

F18-39

10527

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

23405

Females

9766

F18-39

9766

21M→35K

21.0 - 21.8 mi

Top 94%
×7story building
+17ft-86ft

Overall

24936

Females

10624

F18-39

10624

35K→23M

21.8 - 23.0 mi

Top 99%
×5story building
+23ft-63ft

Overall

26269

Females

11268

F18-39

11268

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

23211

Females

9750

F18-39

9750

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25374

Females

10856

F18-39

10856

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

23269

Females

9815

F18-39

9815

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2story building
+22ft-21ft

Overall

24565

Females

10441

F18-39

10441

Passing Analysis

Category:
Athletes Passed
744
Passed By
1773
Net Change
-1029
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23788
5K → 10K15852-837#23788#24625
10K → 15K71207-136#24625#24761
15K → 20K64170-106#24761#24867
20K → Half355+30#24867#24837
Half → 25K2452+243#24837#24594
25K → 30K10181+20#24594#24574
30K → 20M3372-39#24574#24613
20M → 21M6715+52#24613#24561
21M → 35K1145-34#24561#24595
35K → 23M3213-210#24595#24805
23M → 24M561+55#24805#24750
24M → 40K1572-57#24750#24807
40K → 25.2M1311+2#24807#24805
25.2M → Finish1527-12#24805#24817
TOTALS7441773-1029
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing