Boston Marathon logo
BOSTON MARATHON 2023

Stephanie Glass

Bib: 15450•F

OH

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

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
7:51/mi
24:23
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
48:42
↑ 79↓ 1380.4%
15K· 9.32 mi
7:52/mi
1:13:07
↑ 67↓ 78
20K· 12.43 mi
8:40/mi
1:40:02
↑ 106↓ 860.1%
Half· 13.11 mi
8:07/mi
1:45:34
↑ 19↓ 370.5%
25K· 15.53 mi
9:02/mi
2:07:27
↑ 66↓ 880.2%
30K· 18.64 mi
10:10/mi
2:39:03
↑ 181↓ 1480.2%
20M
10:27/mi
2:53:15
↑ 64↓ 500.2%
21M
12:31/mi
3:05:46
↑ 106↓ 241.6%
35K· 21.75 mi
9:16/mi
3:12:42
↑ 17↓ 861.7%
23M
11:17/mi
3:26:50
↑ 23↓ 630.6%
24M
10:40/mi
3:37:30
↓ 821.3%
40K· 24.85 mi
10:50/mi
3:46:46
↓ 200.3%
25.2M
12:54/mi
3:51:13
↑ 13↓ 160.2%
Finish· 26.22 mi
9:10/mi
4:00:33
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:34
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time2:14:59
Pace10:18 /mi
📊Positive Split: 27.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:1224:237:5124:23
7:51
-
10K
6.21 mi11:19:3148:427:5024:19
7:50
-0:01
15K
9.32 mi11:43:561:13:077:5124:25
7:52
+0:02
20K
12.43 mi12:10:511:40:028:0326:55
8:40
+0:48
Half
13.11 mi12:16:231:45:348:035:32
8:07
-0:33
25K
15.53 mi12:38:162:07:278:1221:53
9:02
+0:55
30K
18.64 mi13:09:522:39:038:3231:36
10:10
+1:08
20M
20.00 mi13:24:042:53:158:4014:12
10:27
+0:17
21M
21.00 mi13:36:353:05:468:5112:31
12:31
+2:04
35K
21.75 mi13:43:313:12:428:526:56
9:16
-3:15
23M
23.00 mi13:57:393:26:509:0014:08
11:17
+2:01
24M
24.00 mi14:08:193:37:309:0410:40
10:40
-0:37
40K
24.85 mi14:17:353:46:469:079:16
10:50
+0:10
25.2M
25.20 mi14:22:023:51:139:114:27
12:54
+2:04
Finish
26.22 mi14:31:224:00:339:119:20
9:10
-3:44

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

7:50 /mi

Average Pace

9:11 /mi

Slowest Pace

12:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:39

33% of race

Time at Steady Pace

1:05:04

27% of race

Time at Slower Pace

1:36:50

40% of race

Average Pace: 9:10 /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 mi10:55:1224:237:5124:23
7:51
#12853
10K
6.21 mi11:19:3148:427:5024:19
7:50
#13071
15K
9.32 mi11:43:561:13:077:5124:25
7:52
#13092
20K
12.43 mi12:10:511:40:028:0326:55
8:40
#14482
Half
13.11 mi12:16:231:45:348:035:32
8:07
#14522
25K
15.53 mi12:38:162:07:278:1221:53
9:02
#15383
30K
18.64 mi13:09:522:39:038:3231:36
10:10
#16964
20M
20.00 mi13:24:042:53:158:4014:12
10:27
#17504
21M
21.00 mi13:36:353:05:468:5112:31
12:31
#18264
35K
21.75 mi13:43:313:12:428:526:56
9:16
#18276
23M
23.00 mi13:57:393:26:509:0014:08
11:17
#18784
24M
24.00 mi14:08:193:37:309:0410:40
10:40
#19061
40K
24.85 mi14:17:353:46:469:079:16
10:50
#19245
25.2M
25.20 mi14:22:023:51:139:114:27
12:54
#19412
Finish
26.22 mi14:31:224:00:339:119:20
9:10
#19405
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi128533359335913213(Top 50%)3620(Top 32%)3620(Top 74%)
10K6.21 mi3.10 mi13071-2183492-1333492-13313379(Top 50%)3650(Top 32%)3650(Top 75%)
15K9.32 mi3.11 mi13092-213521-293521-2913213(Top 50%)3620(Top 32%)3620(Top 74%)
20K12.43 mi3.11 mi14482-13904361-8404361-84017912(Top 67%)6464(Top 57%)6464(Top 132%)
Half13.11 mi0.68 mi14522-404381-204381-2015283(Top 57%)4868(Top 43%)4868(Top 100%)
25K15.53 mi2.42 mi15383-8614952-5714952-57119105(Top 72%)7192(Top 63%)7192(Top 147%)
30K18.64 mi3.11 mi16964-15815941-9895941-98921468(Top 81%)8612(Top 75%)8612(Top 176%)
20M20.00 mi1.36 mi17504-5406281-3406281-34021617(Top 81%)8760(Top 77%)8760(Top 179%)
21M21.00 mi1.00 mi18264-7606759-4786759-47823472(Top 88%)9794(Top 86%)9794(Top 201%)
35K21.75 mi0.75 mi18276-126763-46763-419039(Top 72%)7409(Top 65%)7409(Top 152%)
23M23.00 mi1.25 mi18784-5087062-2997062-29922875(Top 86%)9522(Top 83%)9522(Top 195%)
24M24.00 mi1.00 mi19061-2777233-1717233-17122381(Top 84%)9300(Top 81%)9300(Top 190%)
40K24.85 mi0.85 mi19245-1847337-1047337-10422017(Top 83%)9156(Top 80%)9156(Top 187%)
25.2M25.20 mi0.35 mi19412-1677437-1007437-10023851(Top 90%)10110(Top 89%)10110(Top 207%)
Finish26.22 mi1.02 mi19405+77442-57442-518750(Top 70%)7306(Top 64%)7306(Top 150%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

13213

Females

3620

F18-39

3620

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

13379

Females

3650

F18-39

3650

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

13213

Females

3620

F18-39

3620

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

17912

Females

6464

F18-39

6464

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15283

Females

4868

F18-39

4868

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

19105

Females

7192

F18-39

7192

25K→30K

15.5 - 18.6 mi

Top 81%
×9story building
+181ft-148ft

Overall

21468

Females

8612

F18-39

8612

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

21617

Females

8760

F18-39

8760

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

23472

Females

9794

F18-39

9794

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

19039

Females

7409

F18-39

7409

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

22875

Females

9522

F18-39

9522

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

22381

Females

9300

F18-39

9300

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

22017

Females

9156

F18-39

9156

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

23851

Females

10110

F18-39

10110

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

18750

Females

7306

F18-39

7306

Passing Analysis

Category:
Athletes Passed
657
Passed By
7209
Net Change
-6552
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12853
5K → 10K217435-218#12853#13071
10K → 15K209230-21#13071#13092
15K → 20K211411-1390#13092#14482
20K → Half1757-40#14482#14522
Half → 25K20881-861#14522#15383
25K → 30K181599-1581#15383#16964
30K → 20M14554-540#16964#17504
20M → 21M3763-760#17504#18264
21M → 35K4052-12#18264#18276
35K → 23M15523-508#18276#18784
23M → 24M12289-277#18784#19061
24M → 40K16200-184#19061#19245
40K → 25.2M0167-167#19245#19412
25.2M → Finish5548+7#19412#19405
TOTALS6577209-6552
📊

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