Boston Marathon logo
BOSTON MARATHON 2025

Susie Lozick

Bib: 12279•F

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 42%
Gender (Female)
#0 / 12228
Top 27%
Division (F18-39)
#0 / 5469
Top 44%
Race Day Weather
50°/40°F
broken clouds

⏱️ 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
7:39/mi
23:47
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
47:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:43/mi
1:11:23
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:35:39
↑ 106↓ 860.1%
Half· 13.11 mi
7:40/mi
1:40:53
↑ 19↓ 370.5%
25K· 15.53 mi
7:49/mi
1:59:50
↑ 66↓ 880.2%
30K· 18.64 mi
8:04/mi
2:24:54
↑ 181↓ 1480.2%
20M
8:09/mi
2:35:58
↑ 64↓ 500.2%
21M
8:33/mi
2:44:31
↑ 106↓ 241.6%
35K· 21.75 mi
7:53/mi
2:50:25
↑ 17↓ 861.7%
23M
8:05/mi
3:00:32
↑ 23↓ 630.6%
24M
8:00/mi
3:08:32
↓ 821.3%
40K· 24.85 mi
7:55/mi
3:15:18
↓ 200.3%
25.2M
8:36/mi
3:18:16
↑ 13↓ 160.2%
Finish· 26.22 mi
7:35/mi
3:26:00
↑ 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
Time1:40:53
Pace7:42 /mi
2nd Half
Distance13.11 mi
Time1:45:07
Pace8:01 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0323:477:3923:47
7:39
-
10K
6.21 mi11:16:4247:267:3823:39
7:37
-0:02
15K
9.32 mi11:40:391:11:237:4023:57
7:43
+0:06
20K
12.43 mi12:04:551:35:397:4224:16
7:49
+0:06
Half
13.11 mi12:10:091:40:537:425:14
7:40
-0:09
25K
15.53 mi12:29:061:59:507:4318:57
7:49
+0:09
30K
18.64 mi12:54:102:24:547:4625:04
8:04
+0:15
20M
20.00 mi13:05:142:35:587:4811:04
8:09
+0:05
21M
21.00 mi13:13:472:44:317:508:33
8:33
+0:24
35K
21.75 mi13:19:412:50:257:505:54
7:53
-0:40
23M
23.00 mi13:29:483:00:327:5110:07
8:05
+0:12
24M
24.00 mi13:37:483:08:327:518:00
8:00
-0:05
40K
24.85 mi13:44:343:15:187:516:46
7:55
-0:05
25.2M
25.20 mi13:47:323:18:167:522:58
8:36
+0:41
Finish
26.22 mi13:55:163:26:007:527:44
7:35
-1:01

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

7:35 /mi

Average Pace

7:52 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:29

94% of race

Time at Steady Pace

11:31

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:51 /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 mi10:53:0323:477:3923:47
7:39
#13577
10K
6.21 mi11:16:4247:267:3823:39
7:37
#13345
15K
9.32 mi11:40:391:11:237:4023:57
7:43
#13393
20K
12.43 mi12:04:551:35:397:4224:16
7:49
#13330
Half
13.11 mi12:10:091:40:537:425:14
7:40
#13322
25K
15.53 mi12:29:061:59:507:4318:57
7:49
#13141
30K
18.64 mi12:54:102:24:547:4625:04
8:04
#12846
20M
20.00 mi13:05:142:35:587:4811:04
8:09
#12709
21M
21.00 mi13:13:472:44:317:508:33
8:33
#12579
35K
21.75 mi13:19:412:50:257:505:54
7:53
#12510
23M
23.00 mi13:29:483:00:327:5110:07
8:05
#12344
24M
24.00 mi13:37:483:08:327:518:00
8:00
#12296
40K
24.85 mi13:44:343:15:187:516:46
7:55
#12162
25.2M
25.20 mi13:47:323:18:167:522:58
8:36
#12094
Finish
26.22 mi13:55:163:26:007:527:44
7:35
#11995
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi135773641364113594(Top 48%)3780(Top 31%)3780(Top 69%)
10K6.21 mi3.10 mi13345+2323554+873554+8713145(Top 46%)3457(Top 28%)3457(Top 63%)
15K9.32 mi3.11 mi13393-483621-673621-6713594(Top 48%)3780(Top 31%)3780(Top 69%)
20K12.43 mi3.11 mi13330+633621362113363(Top 47%)3738(Top 31%)3738(Top 68%)
Half13.11 mi0.68 mi13322+83621362113193(Top 46%)3593(Top 29%)3593(Top 66%)
25K15.53 mi2.42 mi13141+1813558+633558+6312495(Top 44%)3390(Top 28%)3390(Top 62%)
30K18.64 mi3.11 mi12846+2953449+1093449+10911880(Top 42%)3233(Top 26%)3233(Top 59%)
20M20.00 mi1.36 mi12709+1373419+303419+3011441(Top 40%)3158(Top 26%)3158(Top 58%)
21M21.00 mi1.00 mi12579+1303380+393380+3910827(Top 38%)3014(Top 25%)3014(Top 55%)
35K21.75 mi0.75 mi12510+693368+123368+1211494(Top 40%)3366(Top 28%)3366(Top 62%)
23M23.00 mi1.25 mi12344+1663317+513317+5110643(Top 37%)3061(Top 25%)3061(Top 56%)
24M24.00 mi1.00 mi12296+483322-53322-511259(Top 40%)3439(Top 28%)3439(Top 63%)
40K24.85 mi0.85 mi12162+1343289+333289+339613(Top 34%)2738(Top 22%)2738(Top 50%)
25.2M25.20 mi0.35 mi12094+683273+163273+169521(Top 34%)2798(Top 23%)2798(Top 51%)
Finish26.22 mi1.02 mi11995+993246+273246+279875(Top 35%)2934(Top 24%)2934(Top 54%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

13594

Females

3780

F18-39

3780

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

13145

Females

3457

F18-39

3457

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

13594

Females

3780

F18-39

3780

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13363

Females

3738

F18-39

3738

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

13193

Females

3593

F18-39

3593

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12495

Females

3390

F18-39

3390

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11880

Females

3233

F18-39

3233

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

11441

Females

3158

F18-39

3158

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10827

Females

3014

F18-39

3014

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11494

Females

3366

F18-39

3366

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

10643

Females

3061

F18-39

3061

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11259

Females

3439

F18-39

3439

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9613

Females

2738

F18-39

2738

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9521

Females

2798

F18-39

2798

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

9875

Females

2934

F18-39

2934

Passing Analysis

Category:
Athletes Passed
2580
Passed By
998
Net Change
+1582
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13577
5K → 10K409177+232#13577#13345
10K → 15K178226-48#13345#13393
15K → 20K221158+63#13393#13330
20K → Half4133+8#13330#13322
Half → 25K24968+181#13322#13141
25K → 30K38186+295#13141#12846
30K → 20M19457+137#12846#12709
20M → 21M17040+130#12709#12579
21M → 35K10031+69#12579#12510
35K → 23M19630+166#12510#12344
23M → 24M9648+48#12344#12296
24M → 40K14410+134#12296#12162
40K → 25.2M757+68#12162#12094
25.2M → Finish12627+99#12094#11995
TOTALS2580998+1582
📊

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