Boston Marathon logo
BOSTON MARATHON 2025

Julia Blattner

OR

Bib: 20420 F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 41%
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:15/mi
25:39
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:39/mi
52:33
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:15/mi
1:18:12
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:22/mi
1:44:12
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:15/mi
1:49:50
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:33/mi
2:10:34
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:58/mi
2:38:24
↑ 181↓ 1480.2%
138 ft elev
20M
9:01/mi
2:50:39
↑ 64↓ 500.2%
148 ft elev
21M
9:57/mi
3:00:36
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:52/mi
3:07:14
↑ 17↓ 861.7%
156 ft elev
23M
9:01/mi
3:18:31
↑ 23↓ 630.6%
116 ft elev
24M
9:04/mi
3:27:35
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:47/mi
3:35:06
↓ 200.3%
20 ft elev
25.2M
9:14/mi
3:38:17
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:08/mi
3:46:34
↑ 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 on this race

A one-of-a-kind AI Race Performance Report that reads your race like a coach. A plain-English story of how you raced, where you surged and faded, and what it all means. Emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:50
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:56:44
Pace8:54 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4125:398:1525:39
8:15
-
10K
6.21 mi11:45:3552:338:2726:54
8:39
+0:24
15K
9.32 mi12:11:141:18:128:2325:39
8:15
-0:24
20K
12.43 mi12:37:141:44:128:2326:00
8:22
+0:07
Half
13.11 mi12:42:521:49:508:235:38
8:15
-0:07
25K
15.53 mi13:03:362:10:348:2420:44
8:33
+0:18
30K
18.64 mi13:31:262:38:248:3027:50
8:58
+0:25
20M
20.00 mi13:43:412:50:398:3212:15
9:01
+0:03
21M
21.00 mi13:53:383:00:368:369:57
9:57
+0:56
35K
21.75 mi14:00:163:07:148:376:38
8:52
-1:05
23M
23.00 mi14:11:333:18:318:3811:17
9:01
+0:09
24M
24.00 mi14:20:373:27:358:399:04
9:04
+0:03
40K
24.85 mi14:28:083:35:068:397:31
8:47
-0:17
25.2M
25.20 mi14:31:193:38:178:403:11
9:14
+0:27
Finish
26.22 mi14:39:363:46:348:398:17
8:08
-1:06

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

8:08 /mi

Average Pace

8:39 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:13

40% of race

Time at Steady Pace

1:53:09

50% of race

Time at Slower Pace

22:12

10% of race

Average Pace: 8:38 /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 mi11:18:4125:398:1525:39
8:15
#18463
10K
6.21 mi11:45:3552:338:2726:54
8:39
#19578
15K
9.32 mi12:11:141:18:128:2325:39
8:15
#18969
20K
12.43 mi12:37:141:44:128:2326:00
8:22
#18554
Half
13.11 mi12:42:521:49:508:235:38
8:15
#18507
25K
15.53 mi13:03:362:10:348:2420:44
8:33
#18302
30K
18.64 mi13:31:262:38:248:3027:50
8:58
#18096
20M
20.00 mi13:43:412:50:398:3212:15
9:01
#17986
21M
21.00 mi13:53:383:00:368:369:57
9:57
#18017
35K
21.75 mi14:00:163:07:148:376:38
8:52
#17989
23M
23.00 mi14:11:333:18:318:3811:17
9:01
#17867
24M
24.00 mi14:20:373:27:358:399:04
9:04
#17838
40K
24.85 mi14:28:083:35:068:397:31
8:47
#17722
25.2M
25.20 mi14:31:193:38:178:403:11
9:14
#17637
Finish
26.22 mi14:39:363:46:348:398:17
8:08
#17507
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi184636614661417781(Top 63%)6191(Top 51%)6191(Top 360%)
10K6.21 mi3.10 mi19578-11157229-6157229-61520656(Top 73%)7830(Top 64%)7830(Top 456%)
15K9.32 mi3.11 mi18969+6096892+3376892+33717781(Top 63%)6191(Top 51%)6191(Top 360%)
20K12.43 mi3.11 mi18554+4156653+2396653+23917369(Top 61%)5991(Top 49%)5991(Top 349%)
Half13.11 mi0.68 mi18507+476621+326621+3217715(Top 62%)6169(Top 50%)6169(Top 359%)
25K15.53 mi2.42 mi18302+2056528+936528+9317502(Top 62%)6139(Top 50%)6139(Top 357%)
30K18.64 mi3.11 mi18096+2066450+786450+7817464(Top 61%)6286(Top 51%)6286(Top 366%)
20M20.00 mi1.36 mi17986+1106414+366414+3616876(Top 59%)6075(Top 50%)6075(Top 354%)
21M21.00 mi1.00 mi18017-316443-296443-2918122(Top 64%)6859(Top 56%)6859(Top 399%)
35K21.75 mi0.75 mi17989+286441+26441+217617(Top 62%)6692(Top 55%)6692(Top 390%)
23M23.00 mi1.25 mi17867+1226423+186423+1816350(Top 58%)6087(Top 50%)6087(Top 354%)
24M24.00 mi1.00 mi17838+296445-226445-2217709(Top 62%)6875(Top 56%)6875(Top 400%)
40K24.85 mi0.85 mi17722+1166398+476398+4715178(Top 53%)5622(Top 46%)5622(Top 327%)
25.2M25.20 mi0.35 mi17637+856362+366362+3613212(Top 47%)4631(Top 38%)4631(Top 270%)
Finish26.22 mi1.02 mi17507+1306319+436319+4313833(Top 49%)4879(Top 40%)4879(Top 284%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17781

Females

6191

F40-44

6191

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

20656

Females

7830

F40-44

7830

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17781

Females

6191

F40-44

6191

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

17369

Females

5991

F40-44

5991

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

17715

Females

6169

F40-44

6169

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17502

Females

6139

F40-44

6139

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

17464

Females

6286

F40-44

6286

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

16876

Females

6075

F40-44

6075

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

18122

Females

6859

F40-44

6859

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

17617

Females

6692

F40-44

6692

35K→23M

21.8 - 23.0 mi

Top 58%
×5story building
+23ft-63ft

Overall

16350

Females

6087

F40-44

6087

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17709

Females

6875

F40-44

6875

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15178

Females

5622

F40-44

5622

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13212

Females

4631

F40-44

4631

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

13833

Females

4879

F40-44

4879

Passing Analysis

Category:
Athletes Passed
2738
Passed By
1782
Net Change
+956
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18463
5K → 10K421157-1115#18463#19578
10K → 15K63425+609#19578#18969
15K → 20K44126+415#18969#18554
20K → Half6518+47#18554#18507
Half → 25K27166+205#18507#18302
25K → 30K351145+206#18302#18096
30K → 20M16959+110#18096#17986
20M → 21M84115-31#17986#18017
21M → 35K6941+28#18017#17989
35K → 23M16341+122#17989#17867
23M → 24M9162+29#17867#17838
24M → 40K12610+116#17838#17722
40K → 25.2M894+85#17722#17637
25.2M → Finish14313+130#17637#17507
TOTALS27381782+956
📊

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