Boston Marathon logo
BOSTON MARATHON 2025

Elaina Ziehm

Bib: 18556•F

TN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 47%
Gender (Female)
#0 / 12228
Top 33%
Division (F18-39)
#0 / 5469
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
7:53/mi
24:28
↑ 97↓ 3451.5%
10K· 6.21 mi
7:46/mi
48:35
↑ 79↓ 1380.4%
15K· 9.32 mi
7:49/mi
1:12:52
↑ 67↓ 78
20K· 12.43 mi
7:55/mi
1:37:28
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:42:50
↑ 19↓ 370.5%
25K· 15.53 mi
7:54/mi
2:02:00
↑ 66↓ 880.2%
30K· 18.64 mi
8:08/mi
2:27:16
↑ 181↓ 1480.2%
20M
8:22/mi
2:38:38
↑ 64↓ 500.2%
21M
8:52/mi
2:47:30
↑ 106↓ 241.6%
35K· 21.75 mi
8:08/mi
2:53:35
↑ 17↓ 861.7%
23M
8:23/mi
3:04:05
↑ 23↓ 630.6%
24M
8:19/mi
3:12:24
↓ 821.3%
40K· 24.85 mi
8:22/mi
3:19:33
↓ 200.3%
25.2M
9:08/mi
3:22:42
↑ 13↓ 160.2%
Finish· 26.22 mi
7:51/mi
3:30:42
↑ 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
Time1:47:52
Pace8:14 /mi
📊Positive Split: 4.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:40:1624:287:5324:28
7:53
-
10K
6.21 mi12:04:2348:357:4924:07
7:46
-0:07
15K
9.32 mi12:28:401:12:527:4924:17
7:49
+0:03
20K
12.43 mi12:53:161:37:287:5124:36
7:55
+0:06
Half
13.11 mi12:58:381:42:507:515:22
7:52
-0:03
25K
15.53 mi13:17:482:02:007:5119:10
7:54
+0:02
30K
18.64 mi13:43:042:27:167:5425:16
8:08
+0:14
20M
20.00 mi13:54:262:38:387:5611:22
8:22
+0:14
21M
21.00 mi14:03:182:47:307:598:52
8:52
+0:30
35K
21.75 mi14:09:232:53:357:596:05
8:08
-0:44
23M
23.00 mi14:19:533:04:058:0010:30
8:23
+0:15
24M
24.00 mi14:28:123:12:248:018:19
8:19
-0:04
40K
24.85 mi14:35:213:19:338:027:09
8:22
+0:03
25.2M
25.20 mi14:38:303:22:428:033:09
9:08
+0:46
Finish
26.22 mi14:46:303:30:428:038:00
7:51
-1:17

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

7:46 /mi

Average Pace

8:03 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:18:41

94% of race

Time at Steady Pace

12:01

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:02 /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 mi11:40:1624:287:5324:28
7:53
#15480
10K
6.21 mi12:04:2348:357:4924:07
7:46
#14938
15K
9.32 mi12:28:401:12:527:4924:17
7:49
#14796
20K
12.43 mi12:53:161:37:287:5124:36
7:55
#14624
Half
13.11 mi12:58:381:42:507:515:22
7:52
#14617
25K
15.53 mi13:17:482:02:007:5119:10
7:54
#14338
30K
18.64 mi13:43:042:27:167:5425:16
8:08
#13881
20M
20.00 mi13:54:262:38:387:5611:22
8:22
#13766
21M
21.00 mi14:03:182:47:307:598:52
8:52
#13663
35K
21.75 mi14:09:232:53:357:596:05
8:08
#13642
23M
23.00 mi14:19:533:04:058:0010:30
8:23
#13549
24M
24.00 mi14:28:123:12:248:018:19
8:19
#13524
40K
24.85 mi14:35:213:19:338:027:09
8:22
#13474
25.2M
25.20 mi14:38:303:22:428:033:09
9:08
#13445
Finish
26.22 mi14:46:303:30:428:038:00
7:51
#13394
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi154804821482114518(Top 51%)4319(Top 35%)4319(Top 79%)
10K6.21 mi3.10 mi14938+5424514+3074514+30714481(Top 51%)4239(Top 35%)4239(Top 78%)
15K9.32 mi3.11 mi14796+1424430+844430+8414518(Top 51%)4319(Top 35%)4319(Top 79%)
20K12.43 mi3.11 mi14624+1724356+744356+7414263(Top 50%)4227(Top 35%)4227(Top 77%)
Half13.11 mi0.68 mi14617+74358-24358-214827(Top 52%)4505(Top 37%)4505(Top 82%)
25K15.53 mi2.42 mi14338+2794235+1234235+12313150(Top 46%)3752(Top 31%)3752(Top 69%)
30K18.64 mi3.11 mi13881+4574037+1984037+19812336(Top 43%)3474(Top 28%)3474(Top 64%)
20M20.00 mi1.36 mi13766+1154003+344003+3412946(Top 46%)3944(Top 32%)3944(Top 72%)
21M21.00 mi1.00 mi13663+1033982+213982+2112732(Top 45%)3993(Top 33%)3993(Top 73%)
35K21.75 mi0.75 mi13642+213987-53987-513170(Top 46%)4254(Top 35%)4254(Top 78%)
23M23.00 mi1.25 mi13549+933985+23985+212605(Top 44%)4054(Top 33%)4054(Top 74%)
24M24.00 mi1.00 mi13524+253985398513388(Top 47%)4509(Top 37%)4509(Top 82%)
40K24.85 mi0.85 mi13474+503981+43981+412573(Top 44%)4226(Top 35%)4226(Top 77%)
25.2M25.20 mi0.35 mi13445+293984-33984-312612(Top 44%)4291(Top 35%)4291(Top 78%)
Finish26.22 mi1.02 mi13394+513982+23982+211848(Top 42%)3856(Top 32%)3856(Top 71%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

14518

Females

4319

F18-39

4319

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

14481

Females

4239

F18-39

4239

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

14518

Females

4319

F18-39

4319

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

14263

Females

4227

F18-39

4227

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14827

Females

4505

F18-39

4505

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

13150

Females

3752

F18-39

3752

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

12336

Females

3474

F18-39

3474

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

12946

Females

3944

F18-39

3944

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

12732

Females

3993

F18-39

3993

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

13170

Females

4254

F18-39

4254

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

12605

Females

4054

F18-39

4054

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

13388

Females

4509

F18-39

4509

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12573

Females

4226

F18-39

4226

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

12612

Females

4291

F18-39

4291

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11848

Females

3856

F18-39

3856

Passing Analysis

Category:
Athletes Passed
2945
Passed By
859
Net Change
+2086
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15480
5K → 10K649107+542#15480#14938
10K → 15K268126+142#14938#14796
15K → 20K280108+172#14796#14624
20K → Half4437+7#14624#14617
Half → 25K32243+279#14617#14338
25K → 30K50548+457#14338#13881
30K → 20M17055+115#13881#13766
20M → 21M14845+103#13766#13663
21M → 35K6645+21#13663#13642
35K → 23M15663+93#13642#13549
23M → 24M9267+25#13549#13524
24M → 40K9848+50#13524#13474
40K → 25.2M5324+29#13474#13445
25.2M → Finish9443+51#13445#13394
TOTALS2945859+2086
📊

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