Boston Marathon logo
BOSTON MARATHON 2023

Alyssa Schrack

Bib: 15141•F

NV

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 45%
Gender (Female)
#0 / 11423
Top 27%
Division (F18-39)
#0 / 4884
Top 45%
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
7:42/mi
23:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:47/mi
48:05
↑ 79↓ 1380.4%
15K· 9.32 mi
7:50/mi
1:12:26
↑ 67↓ 78
20K· 12.43 mi
8:05/mi
1:37:33
↑ 106↓ 860.1%
Half· 13.11 mi
7:45/mi
1:42:50
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
2:02:26
↑ 66↓ 880.2%
30K· 18.64 mi
8:19/mi
2:28:16
↑ 181↓ 1480.2%
20M
8:31/mi
2:39:51
↑ 64↓ 500.2%
21M
8:39/mi
2:48:30
↑ 106↓ 241.6%
35K· 21.75 mi
7:57/mi
2:54:27
↑ 17↓ 861.7%
23M
8:09/mi
3:04:39
↑ 23↓ 630.6%
24M
7:43/mi
3:12:22
↓ 821.3%
40K· 24.85 mi
7:56/mi
3:19:09
↓ 200.3%
25.2M
7:47/mi
3:21:50
↑ 13↓ 160.2%
Finish· 26.22 mi
7:02/mi
3:29:00
↑ 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
Time1:42:50
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:46:10
Pace8:06 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5323:557:4223:55
7:42
-
10K
6.21 mi11:18:0348:057:4424:10
7:47
+0:05
15K
9.32 mi11:42:241:12:267:4624:21
7:50
+0:03
20K
12.43 mi12:07:311:37:337:5125:07
8:05
+0:15
Half
13.11 mi12:12:481:42:507:515:17
7:45
-0:20
25K
15.53 mi12:32:242:02:267:5319:36
8:05
+0:20
30K
18.64 mi12:58:142:28:167:5725:50
8:19
+0:14
20M
20.00 mi13:09:492:39:518:0011:35
8:31
+0:12
21M
21.00 mi13:18:282:48:308:018:39
8:39
+0:08
35K
21.75 mi13:24:252:54:278:015:57
7:57
-0:42
23M
23.00 mi13:34:373:04:398:0210:12
8:09
+0:12
24M
24.00 mi13:42:203:12:228:017:43
7:43
-0:26
40K
24.85 mi13:49:073:19:098:016:47
7:56
+0:13
25.2M
25.20 mi13:51:483:21:508:012:41
7:47
-0:09
Finish
26.22 mi13:58:583:29:007:597:10
7:02
-0:45

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

7:02 /mi

Average Pace

7:59 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

38:48

19% of race

Time at Steady Pace

1:53:56

55% of race

Time at Slower Pace

56:16

27% of race

Average Pace: 7:58 /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 mi10:53:5323:557:4223:55
7:42
#11449
10K
6.21 mi11:18:0348:057:4424:10
7:47
#12176
15K
9.32 mi11:42:241:12:267:4624:21
7:50
#12424
20K
12.43 mi12:07:311:37:337:5125:07
8:05
#12847
Half
13.11 mi12:12:481:42:507:515:17
7:45
#12812
25K
15.53 mi12:32:242:02:267:5319:36
8:05
#12889
30K
18.64 mi12:58:142:28:167:5725:50
8:19
#12934
20M
20.00 mi13:09:492:39:518:0011:35
8:31
#12993
21M
21.00 mi13:18:282:48:308:018:39
8:39
#12850
35K
21.75 mi13:24:252:54:278:015:57
7:57
#12794
23M
23.00 mi13:34:373:04:398:0210:12
8:09
#12664
24M
24.00 mi13:42:203:12:228:017:43
7:43
#12491
40K
24.85 mi13:49:073:19:098:016:47
7:56
#12387
25.2M
25.20 mi13:51:483:21:508:012:41
7:47
#12257
Finish
26.22 mi13:58:583:29:007:597:10
7:02
#11956
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi114492571257113042(Top 49%)3501(Top 31%)3501(Top 72%)
10K6.21 mi3.10 mi12176-7272962-3912962-39112959(Top 49%)3405(Top 30%)3405(Top 70%)
15K9.32 mi3.11 mi12424-2483131-1693131-16913042(Top 49%)3501(Top 31%)3501(Top 72%)
20K12.43 mi3.11 mi12847-4233393-2623393-26214121(Top 53%)4171(Top 37%)4171(Top 85%)
Half13.11 mi0.68 mi12812+353370+233370+2312291(Top 46%)3083(Top 27%)3083(Top 63%)
25K15.53 mi2.42 mi12889-773447-773447-7713405(Top 50%)3860(Top 34%)3860(Top 79%)
30K18.64 mi3.11 mi12934-453508-613508-6113112(Top 49%)3816(Top 33%)3816(Top 78%)
20M20.00 mi1.36 mi12993-593562-543562-5413777(Top 52%)4276(Top 37%)4276(Top 88%)
21M21.00 mi1.00 mi12850+1433502+603502+6011374(Top 43%)3072(Top 27%)3072(Top 63%)
35K21.75 mi0.75 mi12794+563481+213481+2111813(Top 44%)3320(Top 29%)3320(Top 68%)
23M23.00 mi1.25 mi12664+1303427+543427+5410835(Top 41%)2937(Top 26%)2937(Top 60%)
24M24.00 mi1.00 mi12491+1733345+823345+829237(Top 35%)2225(Top 19%)2225(Top 46%)
40K24.85 mi0.85 mi12387+1043306+393306+399637(Top 36%)2482(Top 22%)2482(Top 51%)
25.2M25.20 mi0.35 mi12257+1303246+603246+605401(Top 20%)893(Top 8%)893(Top 18%)
Finish26.22 mi1.02 mi11956+3013098+1483098+1485454(Top 20%)901(Top 8%)901(Top 18%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

13042

Females

3501

F18-39

3501

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

12959

Females

3405

F18-39

3405

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

13042

Females

3501

F18-39

3501

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14121

Females

4171

F18-39

4171

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12291

Females

3083

F18-39

3083

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13405

Females

3860

F18-39

3860

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

13112

Females

3816

F18-39

3816

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

13777

Females

4276

F18-39

4276

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

11374

Females

3072

F18-39

3072

21M→35K

21.0 - 21.8 mi

Top 44%
×7story building
+17ft-86ft

Overall

11813

Females

3320

F18-39

3320

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

10835

Females

2937

F18-39

2937

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9237

Females

2225

F18-39

2225

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9637

Females

2482

F18-39

2482

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5401

Females

893

F18-39

893

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2story building
+22ft-21ft

Overall

5454

Females

901

F18-39

901

Passing Analysis

Category:
Athletes Passed
1825
Passed By
2332
Net Change
-507
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11449
5K → 10K90817-727#11449#12176
10K → 15K114362-248#12176#12424
15K → 20K69492-423#12424#12847
20K → Half5116+35#12847#12812
Half → 25K125202-77#12812#12889
25K → 30K163208-45#12889#12934
30K → 20M80139-59#12934#12993
20M → 21M16724+143#12993#12850
21M → 35K8226+56#12850#12794
35K → 23M15121+130#12794#12664
23M → 24M1807+173#12664#12491
24M → 40K11915+104#12491#12387
40K → 25.2M1311+130#12387#12257
25.2M → Finish3032+301#12257#11956
TOTALS18252332-507
📊

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