TCS London Marathon 2026 logo
LONDON MARATHON MASS 2026

Brianne Kalfas

Bib: 77833 F US

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 59786
Gender (Female)
#0 / 26115
Top 44%
Division (F18-39)
#0 / 14744
Top 46%
Race Day Weather
56°/46°F
overcast clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
10:32/mi
32:41
↑ 49↓ 125
10K· 6.21 mi
11:03/mi
1:06:59
↑ 50↓ 81
15K· 9.32 mi
11:05/mi
1:41:25
↑ 44↓ 51
20K· 12.43 mi
10:50/mi
2:15:03
↑ 67↓ 40
Half· 13.10 mi
10:53/mi
2:22:21
↓ 27
25K· 15.53 mi
10:46/mi
2:48:34
↑ 50↓ 63
30K· 18.64 mi
10:57/mi
3:22:33
↑ 69↓ 46
35K· 21.75 mi
10:56/mi
3:56:30
↑ 87↓ 88
40K· 24.85 mi
10:12/mi
4:28:10
↑ 58↓ 75
Finish· 26.22 mi
9:32/mi
4:41:10
↑ 14↓ 18
Course Elevation
503ft
Total climb
166ft
Range
6 to 172 ft
×14
613ft
Total descent

See every mile of your race

Add your watch's GPX to unlock per-mile pace, heart rate, and grade — mile by mile on this timeline.

Works with Garmin, Apple Watch, Strava, COROS, Suunto & more.

The Course

Half Splits

1st Half· via Half
2:22:2110:53 /mi+2.5%
2nd Half
2:18:4910:35 /mi✓ faster
Negative split — 2.5% faster in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
32:4110:323.11 mi32:41
10:32
-
10K
1:06:5910:473.10 mi34:18
11:03
+0:31
15K
1:41:2510:533.11 mi34:26
11:05
+0:02
20K
2:15:0310:533.11 mi33:38
10:50
-0:15
Half(13.10 mi)
2:22:2110:530.67 mi7:18
10:53
+0:03
25K
2:48:3410:522.43 mi26:13
10:46
-0:07
30K
3:22:3310:523.11 mi33:59
10:57
+0:11
35K
3:56:3010:533.11 mi33:57
10:56
-0:01
40K
4:28:1010:483.10 mi31:40
10:12
-0:44
Finish(26.22 mi)
4:41:1010:441.37 mi13:00
9:32
-0:40
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

9:32 /mi

Average Pace

10:44 /mi

Slowest Pace

11:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

44:40

16% of race

Time at Steady Pace

3:56:30

84% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 10:43 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi440101565115651422911477914779
10K3.10 mi44956-94616215-56416215-564458571677916779
15K3.11 mi43888+106815596+61915596+619422911477914779
20K3.11 mi42820+106815080+51615080+516404281402814028
Half(13.10 mi)0.67 mi42490+33014924+15614924+156380721300213002
25K2.43 mi40960+153014223+70114223+701353221188011880
30K3.11 mi39142+181813451+77213451+772322991087610876
35K3.11 mi37210+193212681+77012681+7702788394859485
40K3.10 mi35043+216711868+81311868+8132223874907490
Finish(26.22 mi)1.37 mi34105+93811512+35611512+3561932663206320

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×10
+49ft-125ft

Overall

42291

Females

14779

F18-39

14779

5K→10K

3.1 - 6.2 mi

Top 77%
×4
+50ft-81ft

Overall

45857

Females

16779

F18-39

16779

10K→15K

6.2 - 9.3 mi

Top 71%
+44ft-51ft

Overall

42291

Females

14779

F18-39

14779

15K→20K

9.3 - 12.4 mi

Top 68%
×3
+67ft-40ft

Overall

40428

Females

14028

F18-39

14028

20K→Half

12.4 - 13.1 mi

Top 64%
×2
+8ft-27ft

Overall

38072

Females

13002

F18-39

13002

Half→25K

13.1 - 15.5 mi

Top 59%
×2
+50ft-63ft

Overall

35322

Females

11880

F18-39

11880

25K→30K

15.5 - 18.6 mi

Top 54%
×2
+69ft-46ft

Overall

32299

Females

10876

F18-39

10876

30K→35K

18.6 - 21.8 mi

Top 47%
×2
+87ft-88ft

Overall

27883

Females

9485

F18-39

9485

35K→40K

21.8 - 24.9 mi

Top 37%
×3
+58ft-75ft

Overall

22238

Females

7490

F18-39

7490

40K→Finish

24.9 - 26.2 mi

Top 32%
+14ft-18ft

Overall

19326

Females

6320

F18-39

6320

Passing Analysis

Category:
▲Net Change
+0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#44010
5K → 10K
1473527-946
#44010 → #44956
10K → 15K
1561224+1068
#44956 → #43888
15K → 20K
991167+1068
#43888 → #42820
20K → Half
11341+330
#42820 → #42490
Half → 25K
141544+1530
#42490 → #40960
25K → 30K
241842+1818
#40960 → #39142
30K → 35K
161948+1932
#39142 → #37210
35K → 40K
42171+2167
#37210 → #35043
40K → Finish
1939+938
#35043 → #34105
TOTALS
179811703+9905
#44010 → #34105

Passing Visualized

Category:
Loading...

Passing Circle

Loading...

Position Flow

Loading...

Race Lanes

Loading...

Is this your race? Claim it to upload your GPX and export your data as yours.

Upload your GPX file

Add per-mile pace & heart rate — works with Garmin, Apple Watch, Strava & more.

Download your race track as a GPX or TCX file for Strava, Garmin Connect, or other 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

London Marathon Events

London Marathon Events

Mika Timing

Mika Timing